meta <- packageDescription("DEoptim")
year <- sub(".*(2[[:digit:]]{3})-.*", "\\1", meta$Date)
vers <- paste("R package version", meta$Version)

citEntry(entry = "Manual",
	 title = "{DEoptim:} Differential Evolution Optimization in {R}",
	 author = personList(as.person("David Ardia"), 
                             as.person("Katharine Mullen")),
         year = year,
	 note = vers,
	 url = "http://CRAN.R-project.org/package=DEoptim",
	 textVersion =
         paste("David Ardia and Katharine Mullen (", year,"). ",
               "DEoptim: Differential Evolution Optimization in R. ", vers, ". ",
               "URL http://CRAN.R-project.org/package=DEoptim", sep=""),
         header = "to cite the 'DEoptim' package use:"
)

citEntry(entry = "Book",
         title = "Differential Evolution - A Practical Approach to Global Optimization",
         author = personList(as.person("Kenneth V. Price"),
                             as.person("Rainer M. Storn"),
                             as.person("Jouni A. Lampinen")),
         publisher = "Springer-Verlag",
         series = "Natural Computing",
         month = "January",
         year = "2006",
         note = "ISBN number: 3540209506",
         textVersion =
         paste("Kenneth V. Price, Rainer M. Storn and Jouni A. Lampinen (2006).",
               "Differential Evolution - A Practical Approach to Global Optimization.",
               "Springer-Verlag. ISBN 3540209506."),
         header = "to cite the Differential Evolution algorithm use:"
)