@article{ELMA_1962__17_140741,
     author = {W. Sierpinski},
     title = {Sur une propri\'et\'e des nombres triangulaires},
     journal = {Elemente der Mathematik},
     pages = {28--28},
     year = {1962},
     volume = {17},
     zbl = {0114.26105},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1962__17_140741/}
}