Authors: Rubel, L. A., Butzer, P. L., Stark, E. L.

Superior Title: The American Mathematical Monthly, 1987 May 01. 94(5), 469-470.

Access URL: https://www.jstor.org/stable/2322745

Authors: Butzer, P. L., Stark, E. L., Diamond, Harold G.

Superior Title: The American Mathematical Monthly, 1989 Apr 01. 96(4), 368-369.

Access URL: https://www.jstor.org/stable/2324106

Authors: Butzer, P. L., Barlaz, Joshua

Superior Title: The American Mathematical Monthly, 1961 Aug 01. 68(7), 673-674.

Access URL: https://www.jstor.org/stable/2311533

Authors: Gordon, Basil, Butzer, P. L., Bateman, P. T., Rainwater, John, Newman, D. J., Frame, J. S.

Superior Title: The American Mathematical Monthly, 1960 May 01. 67(5), 479-479.

Access URL: https://www.jstor.org/stable/2309314

Authors: Butzer, P. L., Andrea, Stephen

Superior Title: The American Mathematical Monthly, 1961 Apr 01. 68(4), 385-385.

Access URL: https://www.jstor.org/stable/2311605