On powerful numbers.
Mollin, R.A., Walsh, P.G. (1986)
International Journal of Mathematics and Mathematical Sciences
Similarity:
Mollin, R.A., Walsh, P.G. (1986)
International Journal of Mathematics and Mathematical Sciences
Similarity:
Andruch-Sobiło, Anna (2005)
Applied Mathematics E-Notes [electronic only]
Similarity:
S. Chowla, M. Cowles, J. Cowles (1980)
Acta Arithmetica
Similarity:
N. Ankeny, S Chowla (1962)
Acta Arithmetica
Similarity:
Alan Zame (1972)
Acta Arithmetica
Similarity:
H. Williams (1981)
Acta Arithmetica
Similarity:
Stanislav Jakubec (1995)
Acta Mathematica et Informatica Universitatis Ostraviensis
Similarity:
Jerzy Urbanowicz (1983)
Acta Arithmetica
Similarity: