@article{SSS_1976-1977____A5_0,
     author = {Demazure, M.},
     title = {Surfaces de {Del} {Pezzo} : {II} - {\'Eclater} $n$ points dans $\mathbb {P}^2$},
     journal = {S\'eminaire sur les singularit\'es des surfaces},
     note = {talk:4},
     pages = {1--13},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1976-1977},
     zbl = {0444.14024},
     language = {fr},
     url = {http://www.numdam.org/item/SSS_1976-1977____A5_0/}
}