@article{10_4064_ap_9_1_79_99,
     author = {W. \.Zakowski},
     title = {Sur un probl\`eme non lin\'eaire de {Hilbert}},
     journal = {Annales Polonici Mathematici},
     pages = {79--99},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {1960},
     doi = {10.4064/ap-9-1-79-99},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-9-1-79-99/}
}