@misc{MARSLBB_1872__39_251956,
     title = {[unknown]},
     journal = {M\'emoires de l 'Acad\'emie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique},
     pages = {142--142},
     publisher = {mathdoc},
     volume = {39},
     year = {1872},
     url = {http://geodesic.mathdoc.fr/item/MARSLBB_1872__39_251956/}
}