@article{04014798, title = {The generalization and proof of Bertrand's postulate.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {10}, year = {1987}, pages = {821-824}, doi = {10.1155/S0161171287000917}, zbl = {0625.10005}, language = {en}, url = {http://dml.mathdoc.fr/item/04014798} }
Giordano, George. The generalization and proof of Bertrand's postulate.. International Journal of Mathematics and Mathematical Sciences, Tome 10 (1987) pp. 821-824. doi : 10.1155/S0161171287000917. http://gdmltest.u-ga.fr/item/04014798/