@article{MM2_1995__88_1_156144,
     author = {Yuji Hasegawa and Ki-ichiro Hashimoto},
     title = {On type numbers of split orders of definite quaternion algebras.},
     journal = {Manuscripta mathematica},
     pages = {525--534},
     publisher = {mathdoc},
     volume = {88},
     number = {1},
     year = {1995},
     zbl = {0851.11065},
     url = {http://geodesic.mathdoc.fr/item/MM2_1995__88_1_156144/}
}