TY - JOUR AU - A. M. Shelekhov TI - A~generalized theorem on curvilinear three-web boundaries and its applications JO - Sbornik. Mathematics PY - 2020 SP - 422 EP - 454 VL - 211 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_2020_211_3_a3/ LA - en ID - SM_2020_211_3_a3 ER -