Fiński prof. matematyki.

Kp. Conformal geometry and quasiregular mappings / Matti Vuorinen. - Berlin, 1988. ( Dept. of Mathematics, Univ. of Helsinki)

Kp. Conformal invariants, inequalities, and quasiconformal maps / Glen D. Anderson, Mavina K. Vamanamurthy, Matti K. Vuorinen. - New York, 1997.

LCA online

Ahlfors theorems for differential forms / O. Martio, V. M. Miklyukov and M. Vuorinen. - Helsinki, 2007.

BNF-NA