@article{SEDP_1985-1986____A11_0,
     author = {Petkov, V. M. and Stojanov, L. N.},
     title = {Propri\'et\'es g\'en\'eriques de l'application de {Poincar\'e} et des g\'eod\'esiques p\'eriodiques g\'en\'eralis\'ees},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:11},
     pages = {1--12},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1985-1986},
     mrnumber = {874570},
     zbl = {0611.58048},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1985-1986____A11_0/}
}