@article{BUMI_1929_1_8_1_a3,
     author = {Godeaux, Lucien},
     title = {Sur les congruences conjugu\'ees et harmoniques \`a une surface},
     journal = {Bollettino della Unione matematica italiana},
     pages = {21--23},
     publisher = {mathdoc},
     volume = {Ser. 1, 8},
     number = {1},
     year = {1929},
     zbl = {55.1065.05},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1929_1_8_1_a3/}
}