Strongest Columns and Isoperimetric Inequalities for Eigenvalues, (with I. Tadjbakhsh), J. Appl. Mech., 29E 159-164, Mar. 1962;
    Appl. Mech. Revs., 15, 5774, 1962.

    Buckled States of Circular Plates, (with H.B. Keller and E.L. Reiss), Quart. Appl. Math., 20, 55-65, April 1962.

Keller JB (1960). The shape of the strongest column. Archives Rational
Mechanical Analysis, 5,. pp. 275?285.