Boyadzhiev, T. L.; Dolapchiev, Blagovest I.; Tkalich, V. S. Variationsprinzipien für die Gleichungen in Quasiveränderlichen der analytischen Dynamik. (Russian) Zbl 0327.49023 God. Sofij. Univ., Mat. Fak. 66(1971/72), 93-105 (1974). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 49K20 Optimality conditions for problems involving partial differential equations PDFBibTeX XMLCite \textit{T. L. Boyadzhiev} et al., God. Sofiĭ. Univ., Mat. Fak. 66, 93--105 (1974; Zbl 0327.49023)