@article{JSFU_2021_14_5_a1,
     author = {Valery V. Denisenko and Semen A. Nesterov},
     title = {Energy method for the elliptic boundary value problems with asymmetric operators in a spherical layer},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {554--565},
     publisher = {mathdoc},
     volume = {14},
     number = {5},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2021_14_5_a1/}
}