@article{JRAM_1989__397_153133,
     author = {H.H. M\"uller and H. Str\"oher and H.G. Zimmer},
     title = {Torsion groups of elliptic curves with integral j-invariant over quadratic fields.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {100--161},
     publisher = {mathdoc},
     volume = {397},
     year = {1989},
     zbl = {0662.14020},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1989__397_153133/}
}