@article{CMH_1945__18_138882,
     author = {M.A. Ostrowski},
     title = {Sur l'int\'egrabilit\'e \'el\'ementaire de quelques classes d'expressions.},
     journal = {Commentarii mathematici Helvetici},
     pages = {283--308},
     publisher = {mathdoc},
     volume = {18},
     year = {1945},
     zbl = {0063.06063},
     url = {http://geodesic.mathdoc.fr/item/CMH_1945__18_138882/}
}