Aron Pinker, Thomas E. Elsner, Alan Wayne, K. R. S. Sastry, R. S. Luthar, Sidney Penner, Norman Schaumberger, James W. Murdock, Sarah L. M. Christiansen, Abe Simowitz, Ann E. Watkins, Arnold Lapidus, Vinton Geistfeld, Bertram Kabak, Robert A. Sutton, Jr., Donald C. Fuller, Mary Katherine King, V. N. Murty, Problems, The Two-Year College Mathematics Journal, Vol. 10, No. 3 (Jun., 1979), pp. 210-217
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