An elementary treatise on the calculus with illustrations from geometry, mechanics and physics par Gibson, George A. (George Alexander), 1858-1930

Differential calculus. par U.S. Armed Forces Institute, Madison Wis

Lehrbuch der variations rechnung. par Kneser, Adolf, 1862

Problems in differential calculus supplementary to a treatise on differential calculus par Byerly, William Elwood 1849-

An Elementary treatise on the differential calculus,containing the theory of plane curves, with numerous examples. par William, Benjamin

An elementary treatise on the differential and integral calculus with examples and applications par Osborne, George A. (George Abbott), 1839-1927

An elementary treatise on the differential and integral calculus: with numerous examples. par Bowser, Edward Albert

Journal of Heuristics [ejournal].

Available for University of the Philippines Diliman via Springerlink. Click here to access

Journal of Optimization Theory and Applications [ejournal].

Available for University of the Philippines Diliman via Springerlink. Click here to access

Manuscripta Mathematica [ejournal].

Available for University of the Philippines Diliman via Springerlink. Click here to access