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@article{MAN_1974__212_182731, author = {M.J. Wicks}, title = {The {Symmetries} of {Classes} of {Elements} in a {Free} {Group} of {Rank} {Two.}}, journal = {Mathematische Annalen}, pages = {21--44}, publisher = {mathdoc}, volume = {212}, year = {1974}, zbl = {0277.20053}, url = {http://geodesic.mathdoc.fr/item/MAN_1974__212_182731/} }
M.J. Wicks. The Symmetries of Classes of Elements in a Free Group of Rank Two.. Mathematische Annalen, Tome 212 (1974), pp. 21-44. http://geodesic.mathdoc.fr/item/MAN_1974__212_182731/