@article{RM_1993_48_3_a1,
     author = {V. E. Nazaikinskii and B. Yu. Sternin and V. E. Shatalov},
     title = {Contact geometry and linear differential equations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {93--132},
     publisher = {mathdoc},
     volume = {48},
     number = {3},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1993_48_3_a1/}
}