@article{10_14708_wm_v2i2_2745,
     author = {J. Browkin},
     title = {Pewna w{\l}asno\'s\'c liczb tr\'ojk\k{a}tnych},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 253--255},
     year = {1959},
     volume = {2},
     number = {2},
     doi = {10.14708/wm.v2i2.2745},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v2i2.2745/}
}