%0 Journal Article %A Duff, G.F.D. %T Multiple integrals in the calculus of variations by C.B. Morrey. Springer-Verlag, New York, 1966. ix + 506 pages. %J Canadian mathematical bulletin %D 1968 %P 313-314 %V 11 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500029076/ %R 10.1017/S0008439500029076 %F 10_1017_S0008439500029076