@article{AIHPA_1992__57_2_117_0,
     author = {Foulon, P.},
     title = {Estimation de l'entropie des syst\`emes lagrangiens sans points conjugu\'es},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {117--146},
     publisher = {Gauthier-Villars},
     volume = {57},
     number = {2},
     year = {1992},
     mrnumber = {1184886},
     zbl = {0806.58029},
     language = {fr},
     url = {http://www.numdam.org/item/AIHPA_1992__57_2_117_0/}
}