@article{10_14708_wm_v20i01_3433,
     author = {A. Lasota},
     title = {Odwzorowania otwarte w dowodach twierdze\'n o istnieniu rozwi\k{a}za\'n r\'owna\'n r\'o\.zniczkowych},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 76--80},
     publisher = {mathdoc},
     volume = {20},
     number = {01},
     year = {1976},
     doi = {10.14708/wm.v20i01.3433},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v20i01.3433/}
}