APA Edition Citation

Lehto, O., & Virtanen, K. I. (1973). Quasiconformal mappings in the plane (23.).

Chicago Edition Citation

Lehto, O., and K I. Virtanen. Quasiconformal Mappings in the Plane. 23. Springer-Verlag, New York, 1973.

MLA Edition Citation

Lehto, O., and K I. Virtanen. Quasiconformal Mappings in the Plane. 23. 1973.