@article{PMF_1952_48_1_a7,
     author = {Szmydt, Z.},
     title = {Un th\'eor\`eme de {M.} {Knebelman}},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {101--103},
     publisher = {mathdoc},
     volume = {48},
     number = {1},
     year = {1952},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/PMF_1952_48_1_a7/}
}