@article{DAN_1981_261_5_a7,
     author = {V. P. Maslov},
     title = {Global exponential asymptotic behavior of solutions of equations of tunnel type},
     journal = {Doklady Akademii Nauk},
     pages = {1059--1062},
     publisher = {mathdoc},
     volume = {261},
     number = {5},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_261_5_a7/}
}