@misc{WM_1905_9_1-2_a0,
     title = {Prosty spos\'ob demonstrowania podw\'ojnego za{\l}amania \'swiat{\l}a w cieczach odkszta{\l}conych},
     journal = {Wiadomo\'sci Matematyczne},
     pages = {1--6},
     publisher = {mathdoc},
     volume = {9},
     number = {1-2},
     year = {1905},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/WM_1905_9_1-2_a0/}
}