Hosoya, Haruo Symmetrical combination of the sums and products of trigonometric functions giving integers. (English) Zbl 0880.11024 Symmetry Cult. Sci. 1, No. 4, 431-439 (1990). Reviewer: T.M.Apostol (Pasadena) MSC: 11B99 33B10 11L03 PDFBibTeX XMLCite \textit{H. Hosoya}, Symmetry Cult. Sci. 1, No. 4, 431--439 (1990; Zbl 0880.11024)
Huybers, Pieter; van der Ende, Gerrit Polyhedral geometry as a basis for building structures and other materials systems. (English) Zbl 0883.51006 Symmetry Cult. Sci. 1, No. 4, 387-422 (1990). MSC: 51M20 52B10 00A69 PDFBibTeX XMLCite \textit{P. Huybers} and \textit{G. van der Ende}, Symmetry Cult. Sci. 1, No. 4, 387--422 (1990; Zbl 0883.51006)