@article{MZM_1996_60_3_a3,
     author = {A. V. Glushak},
     title = {Perturbations of an abstract {Euler{\textendash}Poisson{\textendash}Darboux} equation},
     journal = {Matemati\v{c}eskie zametki},
     pages = {363--369},
     year = {1996},
     volume = {60},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1996_60_3_a3/}
}