Barannik, L. F.; Barannik, V. F. On the structure of the center of the normed multiplicative group of crossed group ring. (English) Zbl 0792.16027 Dopov. Akad. Nauk Ukr. 1993, No. 1, 9-11 (1993). Reviewer: S.V.Mihovski (Plovdiv) MSC: 16S35 16U70 20C05 16U60 12F05 PDFBibTeX XMLCite \textit{L. F. Barannik} and \textit{V. F. Barannik}, Dopov. Akad. Nauk Ukr. 1993, No. 1, 9--11 (1993; Zbl 0792.16027)
Handelman, David Positive polynomials and product type actions of compact groups. (English) Zbl 0571.46045 Mem. Am. Math. Soc. 320, 79 p. (1985). Reviewer: D.Petz MSC: 46L55 46L05 22C05 12D99 52Bxx 06F25 PDFBibTeX XMLCite \textit{D. Handelman}, Positive polynomials and product type actions of compact groups. Providence, RI: American Mathematical Society (AMS) (1985; Zbl 0571.46045) Full Text: DOI