@article{AIHPA_1979__30_2_129_0,
     author = {Gotay, Mark J. and Nester, James M.},
     title = {Presymplectic lagrangian systems. {I} : the constraint algorithm and the equivalence theorem},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {129--142},
     publisher = {Gauthier-Villars},
     volume = {30},
     number = {2},
     year = {1979},
     mrnumber = {535369},
     zbl = {0414.58015},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPA_1979__30_2_129_0/}
}