@article{PORMA_1998__55_4_48290,
     author = {Deshpande, M.N.},
     title = {One property of triangular numbers.},
     journal = {Portugaliae mathematica},
     pages = {381--383},
     publisher = {mathdoc},
     volume = {55},
     number = {4},
     year = {1998},
     zbl = {0926.11007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1998__55_4_48290/}
}