@article{BUMI_1962_3_17_1_a3,
     author = {M\k{a}kowski, A.},
     title = {Remarks on triangular and tetrahedral numbers.},
     journal = {Bollettino della Unione matematica italiana},
     pages = {20--21},
     publisher = {mathdoc},
     volume = {Ser. 3, 17},
     number = {1},
     year = {1962},
     zbl = {0106.25902},
     mrnumber = {138588},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1962_3_17_1_a3/}
}