@article{PMF_1890_2_1_a4,
     author = {Natanson, W{\l}.},
     title = {O teoryi cynetyczn\'ej zjawiska {Joule'a}},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {75--92},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1890},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1890_2_1_a4/}
}