%0 Journal Article
%A Okubo, T.
%T Variational Principles, by B. L. Moiseiwitsch. Interscience Monographs, Vol. XX. Wiley, NewYork, 1966. x + 310 pages. $14.00.
%J Canadian mathematical bulletin
%D 1967
%P 623-624
%V 10
%N 4
%U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500028666/
%R 10.1017/S0008439500028666
%F 10_1017_S0008439500028666