@article{IVM_2020_11_a5,
     author = {I. P. Denisova},
     title = {On a mathematical problem in the theory of {Goldstone} bosons},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {81--86},
     publisher = {mathdoc},
     number = {11},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2020_11_a5/}
}