diff --git a/DESCRIPTION b/DESCRIPTION
index cfbe94a..fe3cf2b 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -8,4 +8,4 @@ Description: This is a package gathering different functions to work with the
     Generalized Asymmetric Laplace distribution
 Suggests:
     MASS
-License: GPL-3
+License: LGPL-3
diff --git a/LICENSE b/LICENSE
deleted file mode 100644
index 6600f1c..0000000
--- a/LICENSE
+++ /dev/null
@@ -1,165 +0,0 @@
-GNU LESSER GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-
-  This version of the GNU Lesser General Public License incorporates
-the terms and conditions of version 3 of the GNU General Public
-License, supplemented by the additional permissions listed below.
-
-  0. Additional Definitions.
-
-  As used herein, "this License" refers to version 3 of the GNU Lesser
-General Public License, and the "GNU GPL" refers to version 3 of the GNU
-General Public License.
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-other than an Application or a Combined Work as defined below.
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diff --git a/R/characteristicfunction.R b/R/cfGAL.R
similarity index 91%
rename from R/characteristicfunction.R
rename to R/cfGAL.R
index e88a6ea..d6ef641 100644
--- a/R/characteristicfunction.R
+++ b/R/cfGAL.R
@@ -9,12 +9,11 @@
 #' @param u Transform variate
 #' @param param Parameter vector
 #' @param type Choose between "mu" or "kappa" parametrization
-#' @param log Boolean for log-parameters
+#' @param log Logical for log-parameters
 #' @return Characteristic function value at point u for given parameter vector
 #' 
 #' @author Francois Pelletier
-
-characteristicfn <- function(u,param,type="mu",log=FALSE)
+cfGAL <- function(u,param,type="mu",log=FALSE)
 {
 	if(log)
 	{
diff --git a/R/changetypeGAL.R b/R/changetypeGAL.R
new file mode 100644
index 0000000..7ba6131
--- /dev/null
+++ b/R/changetypeGAL.R
@@ -0,0 +1,41 @@
+# Change type of parametrization of GAL distribution
+# 
+# Author: Francois Pelletier
+#
+# LGPL 3.0
+###############################################################################
+
+#' Change type of parametrization of GAL distribution
+#' @param param Parameter vector
+#' @param type Choose between "mu" or "kappa" parametrization
+#' @param target Choose between "mu" or "kappa" parametrization
+#' @param log Logical for log-parameters
+#' @return The converted parameter vector
+#' 
+#' @author Francois Pelletier
+changetypeGAL <- function(param,type="mu",target="kappa",log=FALSE)
+{
+	if(log)
+	{
+		if(type=="mu" && target=="kappa")
+		{
+			c(param[1],param[2],log((sqrt(4*exp(param[2])^2+exp(param[3])^2)-exp(param[3]))/(2*exp(param[2]))),param[4])
+		}
+		else if(type=="kappa" && target=="mu")
+		{
+			c(param[1],param[2],log(exp(param[2])*(1/exp(param[3])-exp(param[3]))/sqrt(2)),param[4])
+		}				
+	}
+	else
+	{
+		if(type=="mu" && target=="kappa")
+		{
+			c(param[1],param[2],(sqrt(4*param[2]^2+param[3]^2)-param[3])/(2*param[2]),param[4])
+		}
+		else if(type=="kappa" && target=="mu")
+		{
+			c(param[1],param[2],param[2]*(1/param[3]-param[3])/sqrt(2),param[4])
+		}		
+	}
+}
+
diff --git a/R/dGAL.r b/R/dGAL.r
new file mode 100644
index 0000000..eecd280
--- /dev/null
+++ b/R/dGAL.r
@@ -0,0 +1,45 @@
+#' Density function for the GAL distribution
+#' @param x vector of quantiles
+#' @param param Parameter vector
+#' @param type Choose between "mu" or "kappa" parametrization
+#' @param log Logical for log-parameters
+#' @return density at quantile x
+#' 
+#' @author Francois Pelletier
+dGAL <- function(x,param,type="mu",log=FALSE)
+{
+	if(log)
+	{
+		if(type=="mu")
+		{
+			dGAL(x,changetypeGAL(param=param,log=log),type="kappa",log=log)
+		}
+		else if(type=="kappa")
+		{
+			num1 <- sqrt(2)*exp(sqrt(2)/(2*exp(param[2]))*(1/exp(param[3])-exp(param[3]))*(x-exp(param[1])))
+			denom1 <- sqrt(pi)*exp(param[2])^(exp(param[4])+1/2)*gamma(exp(param[4]))
+			num2 <- sqrt(2)*abs(x-exp(param[1]))
+			denom2 <- exp(param[3])+1/exp(param[3])
+			expo1 <- exp(param[4])-1/2
+			besselarg <- sqrt(2)/(2*exp(param[2]))*(1/exp(param[3])+exp(param[3]))*abs(x-exp(param[1]))
+			num1/denom1 * (num2/denom2)^expo1 * besselK(besselarg,expo1)
+		}				
+	}
+	else
+	{
+		if(type=="mu")
+		{
+			dGAL(x,changetypeGAL(param=param,log=log),type="kappa",log=log)
+		}
+		else if(type=="kappa")
+		{
+			num1 <- sqrt(2)*exp(sqrt(2)/(2*param[2])*(1/param[3]-param[3])*(x-param[1]))
+			denom1 <- sqrt(pi)*param[2]^(param[4]+1/2)*gamma(param[4])
+			num2 <- sqrt(2)*abs(x-param[1])
+			denom2 <- param[3]+1/param[3]
+			expo1 <- param[4]-1/2
+			besselarg <- sqrt(2)/(2*param[2])*(1/param[3]+param[3])*abs(x-param[1])
+			num1/denom1 * (num2/denom2)^expo1 * besselK(besselarg,expo1)
+		}		
+	}
+}
\ No newline at end of file
diff --git a/man/characteristicfn.Rd b/man/cfGAL.Rd
similarity index 72%
rename from man/characteristicfn.Rd
rename to man/cfGAL.Rd
index e4b3056..4779862 100644
--- a/man/characteristicfn.Rd
+++ b/man/cfGAL.Rd
@@ -1,8 +1,8 @@
-\name{characteristicfn}
-\alias{characteristicfn}
+\name{cfGAL}
+\alias{cfGAL}
 \title{Characteristic function of GAL distribution}
 \usage{
-characteristicfn(u, param, type = "mu", log = FALSE)
+cfGAL(u, param, type = "mu", log = FALSE)
 }
 \arguments{
   \item{u}{Transform variate}
@@ -12,7 +12,7 @@ characteristicfn(u, param, type = "mu", log = FALSE)
   \item{type}{Choose between "mu" or "kappa"
   parametrization}
 
-  \item{log}{Boolean for log-parameters}
+  \item{log}{Logical for log-parameters}
 }
 \value{
 Characteristic function value at point u for given
diff --git a/man/changetypeGAL.Rd b/man/changetypeGAL.Rd
new file mode 100644
index 0000000..b5a2a4f
--- /dev/null
+++ b/man/changetypeGAL.Rd
@@ -0,0 +1,27 @@
+\name{changetypeGAL}
+\alias{changetypeGAL}
+\title{Change type of parametrization of GAL distribution}
+\usage{
+changetypeGAL(param, type = "mu", target = "kappa", log = FALSE)
+}
+\arguments{
+  \item{param}{Parameter vector}
+
+  \item{type}{Choose between "mu" or "kappa"
+  parametrization}
+
+  \item{target}{Choose between "mu" or "kappa"
+  parametrization}
+
+  \item{log}{Logical for log-parameters}
+}
+\value{
+The converted parameter vector
+}
+\description{
+Change type of parametrization of GAL distribution
+}
+\author{
+Francois Pelletier
+}
+
diff --git a/man/dGAL.Rd b/man/dGAL.Rd
new file mode 100644
index 0000000..be6246b
--- /dev/null
+++ b/man/dGAL.Rd
@@ -0,0 +1,26 @@
+\name{dGAL}
+\alias{dGAL}
+\title{Density function for the GAL distribution}
+\usage{
+dGAL(x, param, type = "mu", log = FALSE)
+}
+\arguments{
+  \item{x}{vector of quantiles}
+
+  \item{param}{Parameter vector}
+
+  \item{type}{Choose between "mu" or "kappa"
+  parametrization}
+
+  \item{log}{Logical for log-parameters}
+}
+\value{
+density at quantile x
+}
+\description{
+Density function for the GAL distribution
+}
+\author{
+Francois Pelletier
+}
+