BibTeX
@BOOK{
         Kolchin1973DAa,
       AUTHOR = "Ellis Robert Kolchin",
       TITLE = "Differential Algebra and Algebraic Groups",
       PUBLISHER = "Academic Press",
       SERIES = "Pure and Applied Mathematics",
       NUMBER = "54",
       ADDRESS = "New York",
       YEAR = "1973",
       REFERRED = "[Pusch1996JSa]."
}