TY - GEN TY - GEN T1 - Reflection principle for solutions of elliptic partial differential equations and quasiregular mappings T2 - Article JF - Annales Fennici Mathematici VO - 6 IS - 1 SP - 179 OP - 187 A1 - Martio, O., kirjoittaja LA - eng YR - 1981 UL - https://kansalliskirjasto.finna.fi/Record/journalfi.article134409 NO - Volume 06, 1981 ER -