@article{hull:1986:vpe,
    author = {Hull, T. E. and Abrham, A.},
     title = {Variable precision exponential function},
   journal = {ACM Trans. Math. Software},
  fjournal = {Association for Computing Machinery. Transactions on
              Mathematical Software},
    volume = {12},
      year = {1986},
    number = {2},
     pages = {79–91},
      issn = {0098-3500},
     coden = {ACMSCU},
   mrclass = {65D15 (65D20)},
  mrnumber = {MR0863786},
       doi = {10.1145/6497.6498},
     zblno = {0607.65004}}