@article{Elliott:1904:LEG,
author = {Elliott, E. B.},
title = {A formula including {L}egendre's $EK'+KE'-KK'=\frac12\pi$},
journal = {Messenger of Math.},
volume = {33},
year = {1903},
pages = {31–32},
note = {Errata on p. 45 of the same volume.},
zblno = {34.0498.02}}