@article{03950606, title = {Thirty-nine perfect numbers and their divisors.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {9}, year = {1986}, pages = {205-206}, doi = {10.1155/S016117128600025X}, zbl = {0592.10006}, language = {en}, url = {http://dml.mathdoc.fr/item/03950606} }
Asadulla, Syed. Thirty-nine perfect numbers and their divisors.. International Journal of Mathematics and Mathematical Sciences, Tome 9 (1986) pp. 205-206. doi : 10.1155/S016117128600025X. http://gdmltest.u-ga.fr/item/03950606/