TY - JOUR AU - S. S. Girgel TI - Solutions of the wave equation in parabolic rotary coordinates. II. 3D Tricomi--Kummer light beams and other beams with the continuous angular index JO - Problemy fiziki, matematiki i tehniki PY - 2020 SP - 20 EP - 24 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PFMT_2020_4_a2/ LA - ru ID - PFMT_2020_4_a2 ER -