@article{IM2_1974_8_3_a10,
     author = {V. V. Kucherenko},
     title = {Asymptotics of the solution of the system $A(x,-ih\frac\partial{\partial x})$ as~$h\to0$ in the case of characteristics of variable multiplicity},
     journal = {Izvestiya. Mathematics },
     pages = {631--666},
     publisher = {mathdoc},
     volume = {8},
     number = {3},
     year = {1974},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1974_8_3_a10/}
}