@article{CRMATH_2002__334_8_635_0,
     author = {Ha{\i}\ensuremath{\ddot{}}ssinsky, Peter},
     title = {L'invariant de {Calabi} pour les hom\'eomorphismes quasiconformes du disque},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {635--638},
     publisher = {Elsevier},
     volume = {334},
     number = {8},
     year = {2002},
     doi = {10.1016/S1631-073X(02)02334-8},
     language = {fr},
     url = {http://www.numdam.org/articles/10.1016/S1631-073X(02)02334-8/}
}