@article{MZM_2009_85_5_a1,
     author = {A. S. Blagoveshchenskii},
     title = {The {Generalized} {D'Alembert} {Operator} on {Compactified} {Pseudo-Euclidean} {Space}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {652--660},
     publisher = {mathdoc},
     volume = {85},
     number = {5},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2009_85_5_a1/}
}