@article{SSS_1976-1977____A3_0,
     author = {Pinkham, H.},
     title = {Singularit\'es de {Klein} - {I}},
     journal = {S\'eminaire sur les singularit\'es des surfaces},
     note = {talk:2},
     pages = {1--8},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1976-1977},
     zbl = {0459.14008},
     language = {fr},
     url = {http://www.numdam.org/item/SSS_1976-1977____A3_0/}
}