@article{oai:toyama.repo.nii.ac.jp:00015921, author = {YOSHII, Yoji}, journal = {Toyama mathematical journal}, month = {}, note = {We introduce a beautiful order of the rational quaternion algebra(-1,-3)/ℚ , which has an interesting structure like the Hurwitz order. We show that the order is norm euclidean by a geometrical method, which is quite simple. We also show that the quadratic form x²+y²+3z²+3w² is universal, using this order, in an elementary way., Article, Toyama mathematical journal, vol.39, 2017, Page 9-18}, pages = {9--18}, title = {Gausenstein integers}, volume = {39}, year = {2017} }