@article{PMF_1919_30_1_a5,
     author = {Mazurkiewicz, Stefan},
     title = {Studya teratologiczne z teoryi mnogo\'sci. {I.} {O} pewnym {\l}uku prostym},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {139--161},
     publisher = {mathdoc},
     volume = {30},
     number = {1},
     year = {1919},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1919_30_1_a5/}
}