← Search Econometrica Vol. 39 No. 3 1971 Lectures on the Calculus of Variations and Optimal Control Theory Mohamed A. El-Hodiri; Louise Young DOI10.2307/1913279 Volume39 Issue3 Pages653 Sources semanticscholar openalex crossref Cite APA 7 MLA 9 Chicago (author–date) Harvard Elsevier Harvard (JFE, JBF…) The Accounting Review Academy of Management American Marketing Association INFORMS (Management Science) Copy citation Copied ✓