1. Ahlfors L. V., Kleinsche Gruppen in der Ebene und im Raum, Festband zm 70. Geburtstag von Prof. Rolf Nevanlinna, Springer-Verlag, Berlin and New York, 1966, 7–15.
2. _____, Lecture on Quasiconformal Mappings, Van Nostrand Math. Studies, Princeton, New Jersey, 1966.
3. _____, Conditions for Quasiconformal Deformations in Several Variables, Contribution to Analysis, A Collection of Papers Dedicated to Lipman Bers, Acad. Press, New York, London, 1974, 19–25.
4. Lecture Notes in Mathematics;L. V. Ahlfors,1976
5. Bers L., Theory of Pseudoanalytic Functions, New York, University Press, 1953.