@article{VTGU_2017_45_a2,
     author = {D. Yu. Ivanov},
     title = {Closedness of sums of unbounded operators acting on different variables in the spaces of square-integrable functions of several variables},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {35--48},
     year = {2017},
     number = {45},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2017_45_a2/}
}