@article{VMUMM_1987_6_a16,
     author = {A. V. Deryabina},
     title = {A problem without initial conditions for strongly degenerate hyperbolic equations with increasing coefficients},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {71--73},
     year = {1987},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1987_6_a16/}
}