@article{UMJ_2015_1_1_a4,
     author = {Ekaterina A. Kolpakova},
     title = {On connections between generalized solutions of {PDE's} of the first order},
     journal = {Ural mathematical journal},
     pages = {55--60},
     year = {2015},
     volume = {1},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UMJ_2015_1_1_a4/}
}