@article{JMPA_1840_1_5__189_0,
     author = {Delaunay, Ch.},
     title = {Observations sur un m\'emoire de {M.} {Paul} {Breton}},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {189--191},
     publisher = {Gauthier-Villars},
     volume = {1e s{\'e}rie, 5},
     year = {1840},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1840_1_5__189_0/}
}