@article{gautschi:1964:aib,
    author = {Gautschi, W.},
     title = {Algorithm 222: {I}ncomplete beta function ratios},
   journal = {Comm. ACM},
    volume = {7},
      year = {1964},
    number = {3},
     pages = {143–144},
      note = {Variable-precision Algol program. For
              a Certification see
              same journal {\bf{7}} (1964), p. 244.},
      issn = {0001-0782},
       doi = {10.1145/363958.363968},
     links = {\URL[Certification]{http://doi.acm.org/10.1145/364005.364073}}}