@misc{VSGTU_2015_19_4_a15,
     title = {Supplement to the article {{\textquotedblleft}L\'evy} {d'Alambertians} and their application in the quantum theory{\textquotedblright} by {B.~O.~Volkov}},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {799},
     year = {2015},
     volume = {19},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2015_19_4_a15/}
}