1.
Partial differential equations. Berlin, Heidelberg, New York: Springer; 1994.
Partial differential equations. Berlin, Heidelberg, New York : Springer, 17 mai 1994. ISBN 0-387-54677-4
Šubin Mihail Aleksandrovič. (1994). Partial differential equations: VII Spectral theory of differential operators. Springer.
MLA (8th ed.) CitationŠubin Mihail Aleksandrovič. Partial Differential Equations: VII Spectral Theory of Differential Operators. Springer, 1994.
Warning: These citations may not always be 100% accurate.