@article{PIM2_1998__63(77)_258616,
     author = {Balasubramanian, R. and Ramana, D.S.},
     title = {Atkin's theorem on pseudo-squares.},
     journal = {Publications de l 'Institut Math\'ematique. Nouvelle S\'erie},
     pages = {21},
     publisher = {mathdoc},
     volume = {63(77)},
     year = {1998},
     zbl = {0945.11007},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/PIM2_1998__63(77)_258616/}
}