@article{MZM_2003_74_1_a8,
     author = {K. B. Sabitov and S. L. Bibakova},
     title = {Construction of {Eigenfunctions} of the {Tricomi--Neumann} {Problem} for {Equations} of {Mixed} {Type} with {Characteristic} {Degeneration} and {Their} {Application}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {76--87},
     publisher = {mathdoc},
     volume = {74},
     number = {1},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2003_74_1_a8/}
}