CITATION

c <- packageDescription("nlme") 
year <- sub(".*(2[[:digit:]]{3})-.*", "\\1", desc$Date) 
vers <- paste("R package version", desc$Version) 
citEntry(entry="Manual", 
title = "nlme: Linear and Nonlinear Mixed Effects Models", 
author = personList(as.person("Michel Crucifix"), 
as.person("Jonathan Rougier"), 
year = year, 
note = vers, 
textVersion = 
paste("Michel Crucifix and Jonathan Rougier", 
"and the R Core team (", 
year, 
"). glacial: Statistical model and analysis of glacial cycles. ", 
vers, ".", sep=""))