@article{10_4064_am_2_4_380_389,
     author = {J. Litwiniszyn},
     title = {O przemieszczeniach o\'srodk\'ow sypkich},
     journal = {Applicationes Mathematicae},
     pages = {380--389},
     year = {1954},
     volume = {2},
     number = {4},
     doi = {10.4064/am-2-4-380-389},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-2-4-380-389/}
}