@article{NAM_1883_3_2__49_0,
     author = {Picart, A.},
     title = {Th\'eorie nouvelle du calcul des variations},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {49--64},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {3e s{\'e}rie, 2},
     year = {1883},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1883_3_2__49_0/}
}