@article{gautschi:1999:nrc,
    author = {Gautschi, Walter},
     title = {A note on the recursive calculation of incomplete gamma
              functions},
   journal = {ACM Trans. Math. Software},
  fjournal = {Association for Computing Machinery. Transactions on
              Mathematical Software},
    volume = {25},
      year = {1999},
    number = {1},
     pages = {101–107},
      issn = {0098-3500},
     coden = {ACMSCU},
   mrclass = {65D20},
  mrnumber = {MR1697463},
       doi = {10.1145/305658.305717},
     zblno = {0962.65018}}