year <- sub("-.*", "", meta$Date) 
note <- sprintf("R package version %s", meta$Version)
textVersion = paste0("Cebeci, Z., Yildiz, F., Kavlak, A.T., Cebeci, C. & Onder, H. (", year,"). ppclust: Probabilistic and Possibilistic Cluster Analysis. ", note, ", URL https://CRAN.R-project.org/package=ppclust")
bibentry(textVersion, bibtype = "Manual",
 title = "{ppclust}: Probabilistic and Possibilistic Cluster Analysis",
 author = c(person("Zeynel", "Cebeci"),
 person("Figen", "Yildiz"),
 person("A. Tuna", "Kavlak"),
 person("Cagatay", "Cebeci"),
 person("Hasan", "Onder")),
 year = year,
 note = note, 
 url = "https://CRAN.R-project.org/package=ppclust")