@article{702175,
title = {Variational methods of solving linear and nonlinear boundary value problems},
booktitle = {Differential Equations and Their Applications},
series = {GDML\_Books},
publisher = {Publishing House of the Czechoslovak Academy of Sciences},
address = {Prague},
year = {1963},
pages = {77-92},
mrnumber = {MR0170132},
zbl = {0181.42501},
url = {http://dml.mathdoc.fr/item/702175}
}
Mihlin, S. G. Variational methods of solving linear and nonlinear boundary value problems, dans Differential Equations and Their Applications, GDML_Books, (1963), pp. 77-92. http://gdmltest.u-ga.fr/item/702175/