@article{RM_1981_36_5_a0,
     author = {Yu. M. Berezanskii and V. G. Samoilenko},
     title = {On the self-adjointness of differential operators with finitely or infinitely many variables, and evolution equations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1--62},
     publisher = {mathdoc},
     volume = {36},
     number = {5},
     year = {1981},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1981_36_5_a0/}
}