@article{AIHPA_1977__27_1_101_0,
     author = {Tulczyjew, W. M.},
     title = {The {Legendre} transformation},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {101--114},
     publisher = {Gauthier-Villars},
     volume = {27},
     number = {1},
     year = {1977},
     mrnumber = {494271},
     zbl = {0365.58011},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1977__27_1_101_0/}
}