On perfect totient numbers.
Iannucci, Douglas E., Deng, Moujie, Cohen, Graeme L. (2003)
Journal of Integer Sequences [electronic only]
Similarity:
Iannucci, Douglas E., Deng, Moujie, Cohen, Graeme L. (2003)
Journal of Integer Sequences [electronic only]
Similarity:
Mollin, R.A., Walsh, P.G. (1986)
International Journal of Mathematics and Mathematical Sciences
Similarity:
K. Inkeri (1972)
Acta Arithmetica
Similarity:
Cosgrave, John B., Dilcher, Karl (2008)
Integers
Similarity:
Keister, Derrick M., Sellers, James A., Vary, Robert G. (2009)
Integers
Similarity:
Davis, Donald M. (2008)
Integers
Similarity:
Shapiro, Daniel B., Shapiro, S.David (2007)
Integers
Similarity:
Iannucci, Douglas E., Foster, Bertrum (2005)
Journal of Integer Sequences [electronic only]
Similarity:
Cohn, J.H.E. (1999)
International Journal of Mathematics and Mathematical Sciences
Similarity:
A. Rotkiewicz (1983)
Acta Arithmetica
Similarity:
W. Ljunggren (1972)
Acta Arithmetica
Similarity:
Dilcher, Karl, Skula, Ladislav (2006)
Integers
Similarity: