@article{10_4153_CMB_1995_013_6,
     author = {Mitsuhiro, T. and Nakahara, T.},
     title = {The {Class} {Number} {Formula} of a {Real} {Quadratic} {Field} and an {Estimate} of the {Value} of a {Unit}},
     journal = {Canadian mathematical bulletin},
     pages = {98--103},
     year = {1995},
     volume = {38},
     number = {1},
     doi = {10.4153/CMB-1995-013-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1995-013-6/}
}