Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1971__26_141000, author = {Peter Bundschuh}, title = {Zwei {Resultate} \"uber {Trigonalzahlen.}}, journal = {Elemente der Mathematik}, pages = {12--14}, publisher = {mathdoc}, volume = {26}, year = {1971}, zbl = {0206.33701}, url = {http://geodesic.mathdoc.fr/item/ELMA_1971__26_141000/} }
Peter Bundschuh. Zwei Resultate über Trigonalzahlen.. Elemente der Mathematik, Tome 26 (1971), pp. 12-14. http://geodesic.mathdoc.fr/item/ELMA_1971__26_141000/