@article{PMF_1937_44_1_a13,
     author = {Watson, G. N.},
     title = {Singular moduli (4)},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {249--288},
     year = {1937},
     volume = {44},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PMF_1937_44_1_a13/}
}