El Bab, A. S. Okb; Ghany, Hossam A.; Ramadan, S. On strongly negative definite functions for the product of commutative hypergroups. (English) Zbl 1244.43002 Int. J. Pure Appl. Math. 72, No. 2, 203-216 (2011). Reviewer: Michael Voit (Dortmund) MSC: 43A62 PDFBibTeX XMLCite \textit{A. S. O. El Bab} et al., Int. J. Pure Appl. Math. 72, No. 2, 203--216 (2011; Zbl 1244.43002) Full Text: Link
Okb El Bab, A. S.; Ghany, Hossam A.; Ramadan, S. On strongly negative definite functions for the product of commutative hypergroups. (English) Zbl 1239.43006 Int. J. Pure Appl. Math. 71, No. 4, 581-594 (2011). Reviewer: Kathryn Hare (Waterloo) MSC: 43A62 43A22 PDFBibTeX XMLCite \textit{A. S. Okb El Bab} et al., Int. J. Pure Appl. Math. 71, No. 4, 581--594 (2011; Zbl 1239.43006) Full Text: Link