Zhang, Su-Cheng On invariants associated with homotopy groups of spheres. (Chinese, English. English summary) Zbl 0185.27003 Acta Math. Sin. 9, 468-474 (1959); translation in Chin. Math. 9 (1967), 743-750 (1968). Reviewer: K. Shiwaira MSC: 55Q40 55Q25 PDFBibTeX XMLCite \textit{S.-C. Zhang}, Acta Math. Sin. 9, 468--474 (1959; Zbl 0185.27003); translation in Chin. Math. 9 (1967), 743--750 (1968)
Huber, Heinz Zur analytischen Theorie hyperbolischer Raumformen und Bewegungsgruppen. (German) Zbl 0089.06101 Math. Ann. 138, 1-26 (1959). Reviewer: F. van der Blij (Utrecht) MSC: 30F35 PDFBibTeX XMLCite \textit{H. Huber}, Math. Ann. 138, 1--26 (1959; Zbl 0089.06101) Full Text: DOI EuDML