@article{2289, author = {Stolt, B.}, title = {A theorem on triangular numbers}, journal = {Portugaliae mathematica}, volume = {16}, year = {1957}, pages = {3-5}, zbl = {0081.27201}, mrnumber = {0099955}, language = {en}, url = {http://dml.mathdoc.fr/item/2289} }
Stolt, B. A theorem on triangular numbers. Portugaliae mathematica, Tome 16 (1957) pp. 3-5. http://gdmltest.u-ga.fr/item/2289/