@article{10_4153_CJM_1980_079_4, author = {Rooney, P. G.}, title = {On the and {Transformations}}, journal = {Canadian journal of mathematics}, pages = {1021--1044}, year = {1980}, volume = {32}, number = {5}, doi = {10.4153/CJM-1980-079-4}, url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1980-079-4/} }