TY - JOUR AU - T. G. Ehrgashev TI - The fourth double-layer potential for a generalized bi-axially symmetric Helmholtz equation JO - Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika PY - 2017 SP - 45 EP - 56 IS - 50 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VTGU_2017_50_a3/ LA - ru ID - VTGU_2017_50_a3 ER -