@article{GDZPPN002357380, title = {Squares in arithmetical progressions II.}, journal = {Mathematica Scandinavica}, volume = {53}, year = {1983}, pages = {20-23}, zbl = {0511.10014}, url = {http://dml.mathdoc.fr/item/GDZPPN002357380} }
Cohn, J.H.E. Squares in arithmetical progressions II.. Mathematica Scandinavica, Tome 53 (1983) pp. 20-23. http://gdmltest.u-ga.fr/item/GDZPPN002357380/