@article{NAM_1874_2_13__545_0,
     author = {Harkema, C.},
     title = {Sur un cas particulier d{\textquoteright}int\'egration de l{\textquoteright}\'equation
$f(x,y)dx+\varphi (x,y)dy=0$},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {545--548},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {2e s{\'e}rie, 13},
     year = {1874},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1874_2_13__545_0/}
}