@article{NAM_1927_6_2__235_1,
     author = {Sicard, Pierre},
     title = {Esquisse d{\textquoteright}une m\'ethode d{\textquoteright}int\'egration de l{\textquoteright}\'equation aux d\'eriv\'ees partielles du second ordre $a (p, q) \times r + 2 b (p, q) \times s + c( p, q) \times t = o$},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {235--243},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {6e s{\'e}rie, 2},
     year = {1927},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1927_6_2__235_1/}
}