Astala, Kari, 1953- Elliptic partial differential equations and quasiconformal mappings in the plane / Kari Astala, Tadeusz Iwaniec, and Gaven Martin. - Princeton : Princeton University Press, 2009. - xvi, 677 p. ; 24 cm. - Princeton mathematical series ; 48. . Includes bibliographical references and index. ISBN: 9780691137773 (hardcover : acid-free paper) RM298.35 Subjects--Topical Terms: Differential equations, Elliptic.Quasiconformal mappings.