Geodesic
Selfadjointness in essentially semibounded higher-order elliptic operators
Differencialʹnye uravneniâ, Tome 21 (1985) no. 4, pp. 668-677 
A. G. Brusentsev. Selfadjointness in essentially semibounded higher-order elliptic operators. Differencialʹnye uravneniâ, Tome 21 (1985) no. 4, pp. 668-677. http://geodesic.mathdoc.fr/item/DE_1985_21_4_a13/
@article{DE_1985_21_4_a13,
     author = {A. G. Brusentsev},
     title = {Selfadjointness in essentially semibounded higher-order elliptic operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {668--677},
     year = {1985},
     volume = {21},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_4_a13/}
}
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AU  - A. G. Brusentsev
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IS  - 4
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