[Gohierre de Longchamps][1]Gohierre de Longchamps used the pseudonym Elgé for publications in Journal de mathématiques élémentaires and Journal de mathématiques spéciales of which he was editor, see
Lazzeri, G., Gastone Gohierre de Longchamps, Periodico di Mat. (3) 4, 53-59 (1906). ZBL37.0031.04. [1]: https://en.wikipedia.org/wiki/Gaston_Albert_Gohierre_de_Longchamps