Use DOI for gamlss

Author: paulnorthrop

DESCRIPTION

@@ -12,7 +12,7 @@ Description: Fits generalized additive models for the location, scale and shape
     parameters of a generalized extreme value response distribution. The 
     methodology is based on Rigby, R.A. and Stasinopoulos, D.M. (2005), 
     <doi:10.1111/j.1467-9876.2005.00510.x> and implemented using functions from 
-    the 'gamlss' package <https://CRAN.R-project.org/package=gamlss>.
+    the 'gamlss' package <doi:10.32614/CRAN.package.gamlss>.
 Imports: gamlss,
     gamlss.dist,
     nieve,