One property of triangular numbers.
Deshpande, M.N.
Portugaliae Mathematica. Nova Série, Tome 55 (1998), p. 381-383 / Harvested from The Electronic Library of Mathematics
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Publié le : 1998-01-01
EUDML-ID : urn:eudml:doc:48290 
@article{01295498,
     title = {One property of triangular numbers.},
     journal = {Portugaliae Mathematica. Nova S\'erie},
     volume = {55},
     year = {1998},
     pages = {381-383},
     zbl = {0926.11007},
     language = {en},
     url = {http://dml.mathdoc.fr/item/01295498}
}

Deshpande, M.N. One property of triangular numbers.. Portugaliae Mathematica. Nova Série, Tome 55 (1998) pp. 381-383. http://gdmltest.u-ga.fr/item/01295498/