@article{PMF_1914_25_1_a1,
     author = {Wertenstein, Ludwik},
     title = {O odskoku promieniotw\'orczym},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {11--26},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1914},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1914_25_1_a1/}
}