@article{Hille:1929:NSH,
author = {Hille, E.},
title = {Note on some hypergeometric series of higher order},
journal = {J. London Math. Soc.},
fjournal = {Journal of the London Mathematical Society},
volume = {4},
year = {1929},
pages = {50–54},
zblno = {55.0219.03},
doi = {10.1112/jlms/s1-4.1.50}}