\bib{1954/lehmer}
\yr 1954
\mr 16,113e
\by Derrick H. Lehmer
\paper A sieve problem on ``pseudo-squares''
\jour Mathematical Tables and Other Aids to Computation
\issn 0891--6837
\vol 8
\pages 241--242
\url http://links.jstor.org/sici?sici=0891-6837(195410)8:48<237:N>2.0.CO;2-R
\endref