@article{UFA_2020_12_2_a10,
     author = {V. M. Savchin and P. T. Trinh},
     title = {Nonpotentiality of {Sobolev} system and construction of semibounded functional},
     journal = {Ufa mathematical journal},
     pages = {108--118},
     year = {2020},
     volume = {12},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2020_12_2_a10/}
}