@article{MZM_1991_49_4_a3,
     author = {S. Yu. Dobrokhotov and P. N. Zhevandrov and V. P. Maslov and A. I. Shafarevich},
     title = {Asymptotic fast-decreasing solutions of linear, strictly hyperbolic systems with variable coefficients},
     journal = {Matemati\v{c}eskie zametki},
     pages = {31--46},
     publisher = {mathdoc},
     volume = {49},
     number = {4},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_49_4_a3/}
}