citHeader("To cite package 'protr' in publications use:")

if(!exists("meta") || is.null(meta)) meta <- packageDescription("protr")
year <- sub(".*(2[[:digit:]]{3})-.*", "\\1", meta$Date)
vers <- paste("R package version", meta$Version)
     
citEntry(entry = "Manual",
title = "protr: Protein Sequence Descriptor Calculation and Similarity Computation with R",
author = personList(as.person("Nan Xiao"),
					as.person("Qingsong Xu"),
                    as.person("Dongsheng Cao")),
                    
              year = year,
              note = vers,

textVersion =
paste("Nan Xiao, Qingsong Xu, Dongsheng Cao (",
       year,
       "). protr: Protein Sequence Descriptor Calculation and Similarity Computation with R. ",
       vers, ".", sep=""))
