@article{kalla:1992:eva,
    author = {Kalla, S. L.},
     title = {On the evaluation of the {G}auss hypergeometric function},
   journal = {C. R. Acad. Bulgare Sci.},
  fjournal = {Dokladi na B'' lgarskata Akademiya na Naukite. Comptes
              Rendus de l'Acad\'emie Bulgare des Sciences},
    volume = {45},
      year = {1992},
    number = {6},
     pages = {35–36},
      issn = {0861-1459},
   mrclass = {33C05 (33-04 65B10 65D20)},
  mrnumber = {MR1202957 (94a:33001)},
     zblno = {0770.33006}}