TY - JOUR AU - N. P. Volchkova AU - Vit. V. Volchkov TI - Vector fields with zero flux through circles of fixed radius on $ \mathbb{H}^2$ JO - Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki PY - 2022 SP - 3 EP - 17 VL - 32 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VUU_2022_32_1_a0/ LA - ru ID - VUU_2022_32_1_a0 ER -