@article{PORMA_1957__16_1_114779,
     author = {Stolt, B.},
     title = {A theorem on triangular numbers},
     journal = {Portugaliae mathematica},
     pages = {3--5},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1957},
     mrnumber = {0099955},
     zbl = {0081.27201},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1957__16_1_114779/}
}