Posey, Alma E. Rolling cones. (English) Zbl 0456.51019 Pi Mu Epsilon J. 7, 157-164 (1980). MSC: 51N20 PDFBibTeX XMLCite \textit{A. E. Posey}, Pi Mu Epsilon J. 7, 157--164 (1980; Zbl 0456.51019)
Posey, Alma E. On difunctional and circular relations. (English) Zbl 0381.04001 Pi Mu Epsilon J. 6, 394-399 (1977). MSC: 03E20 PDFBibTeX XMLCite \textit{A. E. Posey}, Pi Mu Epsilon J. 6, 394--399 (1977; Zbl 0381.04001)