@article{10_14708_wm_v7i1_2383,
     author = {W. Sierpi\'nski},
     title = {O liczbach tr\'ojk\k{a}tnych, b\k{e}d\k{a}cych sumami dw\'och mniejszych liczb tr\'ojk\k{a}tnych},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 27--28},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1963},
     doi = {10.14708/wm.v7i1.2383},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v7i1.2383/}
}