TY - JOUR AU - E. G. Emel'yanov TI - Extremal decompositions of a~Riemann surface and quasiconformal mappings of a special type JO - Zapiski Nauchnykh Seminarov POMI PY - 1998 SP - 108 EP - 115 VL - 254 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZNSL_1998_254_a6/ LA - ru ID - ZNSL_1998_254_a6 ER -