@article{whipple:1927:tgh,
    author = {Whipple, F. J. W.},
     title = {Some transformations of generalized hypergeometric series},
   journal = {Proc. London Math. Soc. (2)},
  fjournal = {Proceedings of the London Mathematical Society. Second Series},
    volume = {26},
      year = {1927},
    number = {2},
     pages = {257–272},
       doi = {10.1112/plms/s2-26.1.257},
     zblno = {53.0331.03}}