@incollection{MSMF_1974__38__99_0,
     author = {Brasselet, Jean-Paul},
     title = {Une g\'en\'eralisation de la formule de {Riemann-Hurwitz}},
     booktitle = {Journ\'ees de g\'eom\'etrie analytique (Poitiers, 1972)},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {99--106},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {38},
     year = {1974},
     doi = {10.24033/msmf.157},
     mrnumber = {50 #13622},
     zbl = {0335.32005},
     url = {http://www.numdam.org/articles/10.24033/msmf.157/}
}