Astala, K., Iwaniec, T., & Martin, G. (2009). Elliptic partial differential equations and quasiconformal mappings in the plane. Princeton University Press.

Astala, Kari, Tadeusz Iwaniec, and Gaven Martin. Elliptic Partial Differential Equations and Quasiconformal Mappings in the Plane. Princeton: Princeton University Press, 2009.

Astala, Kari, et al. Elliptic Partial Differential Equations and Quasiconformal Mappings in the Plane. Princeton University Press, 2009.