Whittle, Peter. Optimization under constraints : theory and applications of nonli near programming / Peter Whittle. - London : Wiley-Interscience, 1971. - ix, 241 p. : ill.; 24 cm. - Wiley series in probability and mathematical statistics . Includes bibliographical reference (p. 23). Subjects--Topical Terms: Nonlinear programming. Dewey Class. No.: 519.76