@article{PIM_1998_N_S_63_77_a2,
     author = {R. Balasubramanian and D.S. Ramana},
     title = {Atkin's {Theorem} on {Pseudo-squares}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {21 },
     publisher = {mathdoc},
     volume = {_N_S_63},
     number = {77},
     year = {1998},
     zbl = {0945.11007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1998_N_S_63_77_a2/}
}