Lavrentʹev, M. A. (1963). Variational methods for boundary value problems, for systems of elliptic equations. Noordhoff.
Chicago Style (17th ed.) CitationLavrentʹev, Michail Alekseevič. Variational Methods for Boundary Value Problems, for Systems of Elliptic Equations. Groningen: Noordhoff, 1963.
MLA (9th ed.) CitationLavrentʹev, Michail Alekseevič. Variational Methods for Boundary Value Problems, for Systems of Elliptic Equations. Noordhoff, 1963.
Warning: These citations may not always be 100% accurate.