De Donder, Theophile ThĂ©orie invariantive du calcul des variations. Nouvelle edit. (French) Zbl 0013.16901 Paris: Gauthier-Villars & Cie. XXI, 230 p. (1935). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 7 Documents Keywords:Variational calculus PDF BibTeX XML OpenURL