Franz Mertens (1874)

Journal für die reine und angewandte Mathematik

Gutnik, Leonid (2010)

Advances in Difference Equations [electronic only]

D. Lehmer (1975)

Acta Arithmetica

Borwein, J.M., Bradley, D.M., Broadhurst, D.J. (1997)

The Electronic Journal of Combinatorics [electronic only]

Bailey, David H., Borwein, Jonathan M., Bradley, David M. (2006)

Experimental Mathematics

Bailey, David H., Borwein, Jonathan M., Girgensohn, Roland (1994)

Experimental Mathematics