@article{stegun:1976:sce,
    author = {Stegun, Irene A. and Zucker, Ruth},
     title = {Automatic computing methods for special functions. {III}.
              {T}he sine, cosine, exponential integrals, and related
              functions},
   journal = {J. Res. Nat. Bur. Standards Sect. B},
    volume = {80B},
      year = {1976},
    number = {2},
     pages = {291–311},
      note = {Includes Fortran code, maximum accuracy 18S.},
   mrclass = {65D20},
  mrnumber = {MR0428687 (55 \#1707)},
mrreviewer = {Martin E. Price},
     zblno = {0356.33001}}