Lavrent'ev, M. A., & Radok, J. R. M. (1963). Variational methods for boundery value problems for systems of elliptic equations. The Netherlands: P. Noordhoff.
Παραπομπή Chicago StyleLavrent'ev, M. A., and J. R. M. Radok. Variational Methods for Boundery Value Problems for Systems of Elliptic Equations. The Netherlands: P. Noordhoff, 1963.
Παραπομπή MLALavrent'ev, M. A., and J. R. M. Radok. Variational Methods for Boundery Value Problems for Systems of Elliptic Equations. The Netherlands: P. Noordhoff, 1963.
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