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Dedicated to Lars Ahlfors on his eighty-fifth birthday
This research was supported in part by grants from the U.S. National Science Foundation (FWG) and the Institut Mittag-Leffler (FWG and GJM). A portion of the first author’s 1992 Elisha Netanyahu Memorial Lecture is based on this work.
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Gehring, F.W., Martin, G.J. Commutators, collars and the geometry of Möbius groups. J. Anal. Math. 63, 175–219 (1994). https://doi.org/10.1007/BF03008423
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DOI: https://doi.org/10.1007/BF03008423