← Search Econometrica Vol. 29 No. 2 1961 Nonlinear Programming by the Simplex Method H. O. Hartley DOI10.2307/1909291 Volume29 Issue2 Pages223 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 ✓