The Beltrami equation /
Iwaniec, Tadeusz.
Martin, Gaven.
Providence, R.I. : American Mathematical Society,
c2008.
"Volume 191, number 893 (third of 5 numbers)."
Includes bibliographical references (p. 89-92).
Conformal mapping.
Differential equations, Partial.
Geometry, Non-Euclidean.