Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{RMF_2007__82_3_a0, author = {Tren\v{c}ansk\'y, Ivan}, title = {O pyramid\'alnych \v{c}{\'\i}slach}, journal = {Rozhledy matematicko-fyzik\'aln{\'\i}}, pages = {1--6}, publisher = {mathdoc}, volume = {82}, number = {3}, year = {2007}, language = {sl}, url = {http://geodesic.mathdoc.fr/item/RMF_2007__82_3_a0/} }
Trenčanský, Ivan. O pyramidálnych číslach. Rozhledy matematicko-fyzikální, Tome 82 (2007) no. 3, pp. 1-6. http://geodesic.mathdoc.fr/item/RMF_2007__82_3_a0/