by Borden, R. F.
Published in American journal of mathematics (01.10.1920)

by Brown, T. H., Borden, R. F., Van Cleave, H. J.
Published in Sigma Xi quarterly (01.12.1921)

by Sayre, Mortimer F., Sterling, C. M., Anderson, Emma N., Barker, H. C., Borden, R. F., Farr, G. H., Coover, J. E., Okkelberg, Peter, Lewis, H. B., Moulton, C. Robert, Petry, L. C., Knight, C. D., Mason, Thos. E.
Published in Sigma Xi quarterly (01.09.1922)