@article{MAN_1989__283_1_164502,
     author = {David R. Dorman},
     title = {Singular {Moduli,} {Modular} {Polynomials,} and the {Index} of the {Closure} of {Z} [j (...)] in {Q} (j(...)).},
     journal = {Mathematische Annalen},
     pages = {177--192},
     publisher = {mathdoc},
     volume = {283},
     number = {1},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MAN_1989__283_1_164502/}
}