@article{JRAM_1992__426_153407,
     author = {M. Eichler and J. Brzezinski},
     title = {On the imbeddings of imaginary quadratic orders in definite quaternion orders.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {91--106},
     publisher = {mathdoc},
     volume = {426},
     year = {1992},
     zbl = {0737.11035},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1992__426_153407/}
}