     citHeader("To cite package 'longpower' in publications use:")
     
     year <- sub(".*(2[[:digit:]]{3})-.*", "\\1", meta$Date)
     vers <- paste("R package version", meta$Version)
     
     citEntry(entry="article",
              title="Power and Sample Size for Longitudinal Models in R-The longpower Package and Shiny App",
              author=personList(as.person("Samuel Iddi"), as.person("Michael C. Donohue")),
              journal="R Journal",
              volume="14",
              number="1",
              pages="264-281",
              year="2022",
              publisher="R Foundation for Statistical Computing",
              textVersion="Iddi S & Donohue MC. (2022). Power and Sample Size for 
                           Longitudinal Models in R-The longpower Package and Shiny 
                           App. R Journal, 14(1), 264-281.")
     
     citEntry(entry="Manual",
              title = "longpower: Power and sample size calculations for linear mixed models",
              author = personList(as.person("Michael C. Donohue")),
              year = year,
              note = vers,
              textVersion =
              paste("Michael C Donohue, (",
                    year,
                    "). longpower: Power and sample size calculations for longitudinal data. ",
                    vers, ".", sep=""))

     citEntry(entry="book",
              title = "Analysis of longitudinal data",
              author = personList(as.person("P. J. Diggle"),
                                  as.person("P. J. Heagerty"),
                                  as.person("K. Y. Liang"),
                                  as.person("S. L. Zeger")),
              year = 2002,
              edition = "Second Edition",
              publisher = "Oxford Statistical Science Serires",
              textVersion = "Diggle PJ, Heagerty PJ, Liang K, Zeger SL. Analysis of longitudinal 
                             data. Second Edition. Oxford Statistical Science Serires. 2002.")

     citEntry(entry="article",
              title = "Sample size calculations for studies with correlated observations",
              author = personList(as.person("G Liu"),
                                  as.person("KY Liang")),
              year = 1997,
              journal = "Biometrics",
              volume = "53(3)",
              pages = "937-47",
              textVersion = "Liu G & Liang KY. (1997). Sample size calculations for studies with correlated observations. Biometrics, 53(3), 937-47.")

     citEntry(entry="article",
              title = "Sample size estimation for repeated measures analysis in randomized clinical trials with missing data",
              author = personList(as.person("K Lu"),
                                  as.person("X Luo"),
                                  as.person("P-Y Chen")),
              year = 2008,
              journal = "International Journal of Biostatistics",
              volume = "4(1)",
              pages = "937-47",
              textVersion = "Lu K, Luo X & Chen P. (2008). Sample Size Estimation for Repeated Measures Analysis in Randomized Clinical Trials with Missing Data. The International Journal of Biostatistics, 4(1).")

     citEntry(entry="article",
              title="Power and sample size for random coefficient regression models in randomized experiments with monotone missing data",
              author=personList(as.person("Nan Hu"), as.person("Mackey Howard"), as.person("Ronald Thomas")),
              journal="Biometrical Journal",
              volume="63",
              number="4",
              pages="806-824",
              year="2021",
              publisher="R Foundation for Statistical Computing",
              textVersion="Hu N, Mackey H, Thomas R. (2021). Power and sample size for random coefficient regression models in randomized experiments with monotone missing data. Biometrical Journal. 63(4), 806-824.")
