@article{BSMF_1892__20__104_0,
     author = {Transon, Abel},
     title = {Une lettre},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {104--106},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {20},
     year = {1892},
     doi = {10.24033/bsmf.452},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/bsmf.452/}
}

Transon, Abel. Une lettre. Bulletin de la Société Mathématique de France, Tome 20 (1892) , pp. 104-106. doi : 10.24033/bsmf.452. http://archive.numdam.org/articles/10.24033/bsmf.452/