@article{MAN_1898__50_157870,
     author = {Michel Petrovitch},
     title = {Contribution \`a la th\'eorie des solutions singuli\`eres des \'equations diff\'erentielles du premier ordre.},
     journal = {Mathematische Annalen},
     pages = {103--112},
     publisher = {mathdoc},
     volume = {50},
     year = {1898},
     zbl = {28.0281.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1898__50_157870/}
}