\bib{1998/balasubramanian}
\yr 1998
\mr 99e:11012
\by R. Balasubramanian
\by D. S. Ramana
\paper Atkin's theorem on pseudo-squares
\jour Institut Math\'e\-matique, Publications, Nouvelle S\'erie
\issn 0350--1302
\vol 63
\pages 21--25
\endref