@article{tooper:1968:sce,
    author = {Tooper, R. F. and Mark, J.},
     title = {Simplified calculation of $\ExpInti(x)$
              for positive arguments, and a short table of $\SinhInt(x)$},
   journal = {Math. Comp.},
    volume = {22},
      year = {1968},
    number = {102},
     pages = {448–449},
     links = {\URL[FullText]{http://links.jstor.org/sici?sici=0025-5718%28196804%2922%3A102%3C448%3ASCOFPA%3E2.0.CO%3B2-J}},
       doi = {10.2307/2004679},
     zblno = {0153.46801}}