@article{PFMT_2019_1_a2,
     author = {S. S. Girgel},
     title = {Circular $3D$ {Kummer--Gauss} beams with the continuous angular index},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {16--20},
     publisher = {mathdoc},
     number = {1},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2019_1_a2/}
}