Kelley, H. J. A second variation test for singular extremals. (English) Zbl 0136.10101 AIAA J. 2, 1380-1382 (1964). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 25 Documents Keywords:variational calculus PDF BibTeX XML Cite \textit{H. J. Kelley}, AIAA J. 2, 1380--1382 (1964; Zbl 0136.10101) Full Text: DOI OpenURL