@article{1102817104, author = {Pomerance, Carl}, title = {On composite $n$ for which $\varphi(n)\mid n-1$. II.}, journal = {Pacific J. Math.}, volume = {73}, number = {2}, year = {1977}, pages = { 177-186}, language = {en}, url = {http://dml.mathdoc.fr/item/1102817104} }
Pomerance, Carl. On composite $n$ for which $\varphi(n)\mid n-1$. II.. Pacific J. Math., Tome 73 (1977) no. 2, pp. 177-186. http://gdmltest.u-ga.fr/item/1102817104/