@article{GDZPPN002349205, title = {Farey Triangles and Farey Quadrangels in the Complex Plane.}, journal = {Mathematica Scandinavica}, volume = {20}, year = {1967}, pages = {241-295}, zbl = {0172.06601}, url = {http://dml.mathdoc.fr/item/GDZPPN002349205} }
Schmidt, Asmus L. Farey Triangles and Farey Quadrangels in the Complex Plane.. Mathematica Scandinavica, Tome 20 (1967) pp. 241-295. http://gdmltest.u-ga.fr/item/GDZPPN002349205/