Mason, A.W.. "Free quotients of congruence subgroups of Bianchi groups.." Mathematische Annalen 293.1 (1992): 65-76. <http://eudml.org/doc/164945>.
@article{Mason1992, author = {Mason, A.W.}, journal = {Mathematische Annalen}, keywords = {Dedekind ring of arithmetic type; subgroup of finite index; ring of integers; imaginary quadratic number field; coordinate ring; affine curve; projective curve; finite field; congruence subgroups; elementary matrices; principal congruence subgroup; Bianchi groups; free quotient; noncongruence cracks; standard subgroups}, number = {1}, pages = {65-76}, title = {Free quotients of congruence subgroups of Bianchi groups.}, url = {http://eudml.org/doc/164945}, volume = {293}, year = {1992}, }
TY - JOUR AU - Mason, A.W. TI - Free quotients of congruence subgroups of Bianchi groups. JO - Mathematische Annalen PY - 1992 VL - 293 IS - 1 SP - 65 EP - 76 KW - Dedekind ring of arithmetic type; subgroup of finite index; ring of integers; imaginary quadratic number field; coordinate ring; affine curve; projective curve; finite field; congruence subgroups; elementary matrices; principal congruence subgroup; Bianchi groups; free quotient; noncongruence cracks; standard subgroups UR - http://eudml.org/doc/164945 ER -
