@article{CM_1974__29_1_9_0,
     author = {El Zein, F.},
     title = {La classe fondamentale d'un cycle},
     journal = {Compositio Mathematica},
     pages = {9--33},
     publisher = {Noordhoff International Publishing},
     volume = {29},
     number = {1},
     year = {1974},
     mrnumber = {354672},
     zbl = {0347.14004},
     language = {fr},
     url = {http://www.numdam.org/item/CM_1974__29_1_9_0/}
}