@article{SM_1983_44_1_a1,
     author = {B. Yu. Sternin and V. E. Shatalov},
     title = {On a~method of solving equations with simple characteristics},
     journal = {Sbornik. Mathematics},
     pages = {23--59},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1983},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1983_44_1_a1/}
}