@article{IM2_1990_34_2_a10,
     author = {V. G. Danilov and P. N. Zhevandrov},
     title = {On {Maslov's} method for constructing combined asymptotics for $h$-pseudodifferential equations},
     journal = {Izvestiya. Mathematics },
     pages = {425--439},
     publisher = {mathdoc},
     volume = {34},
     number = {2},
     year = {1990},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1990_34_2_a10/}
}