@article {Vardi98,
   AUTHOR = {Vardi, Ilan},
    TITLE = {Archimedes' cattle problem},
  JOURNAL = {Amer. Math. Monthly},
 FJOURNAL = {The American Mathematical Monthly},
   VOLUME = {105},
     YEAR = {1998},
   NUMBER = {4},
    PAGES = {305--319},
     ISSN = {0002-9890},
    CODEN = {AMMYAE},
}