no. 2
« La classe duale aux points doubles » d'une application
Compositio Mathematica, Tome 27 (1973) no. 2, pp. 223-232. 
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     author = {Ronga, Felice},
     title = {{\guillemotleft} {La} classe duale aux points doubles {\guillemotright} d'une application},
     journal = {Compositio Mathematica},
     pages = {223--232},
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     volume = {27},
     number = {2},
     year = {1973},
     zbl = {0271.57009},
     mrnumber = {391114},
     language = {fr},
     url = {http://www.numdam.org/item/CM_1973__27_2_223_0/}
}
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Ronga, F. « La classe duale aux points doubles » d'une application. Compositio Mathematica, Tome 27 (1973) no. 2, pp. 223-232. http://www.numdam.org/item/CM_1973__27_2_223_0/

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