Grundhöfer, Theo; Hähl, Hermann Fibrations of spheres by great spheres over division algebras and their differentiability. (English) Zbl 0695.57016 J. Differ. Geom. 31, No. 2, 357-363 (1990). Reviewer: R.Löwen MSC: 57R22 51H10 53C20 PDF BibTeX XML Cite \textit{T. Grundhöfer} and \textit{H. Hähl}, J. Differ. Geom. 31, No. 2, 357--363 (1990; Zbl 0695.57016) Full Text: DOI
Hähl, Hermann Homologies and elations in compact, connected projective planes. (English) Zbl 0446.51010 Topology Appl. 12, 49-63 (1981). MSC: 51H10 51A10 51A35 54H15 57N15 PDF BibTeX XML Cite \textit{H. Hähl}, Topology Appl. 12, 49--63 (1981; Zbl 0446.51010) Full Text: DOI
Guillou, L.; Hähl, H. Les voisinages réguliers ouverts: critères homotopiques d’identification. (French) Zbl 0344.57002 Compos. Math. 32, 133-156 (1976). MSC: 57N40 55P10 55Q05 57N15 57N30 PDF BibTeX XML Cite \textit{L. Guillou} and \textit{H. Hähl}, Compos. Math. 32, 133--156 (1976; Zbl 0344.57002) Full Text: Numdam EuDML
Siebenmann, L.; Guillou, L.; Hähl, H. Les voisinages ouverts réguliers: critères homotopiques d’existence. (French) Zbl 0318.57011 Ann. Sci. Éc. Norm. Supér. (4) 7, 431-461 (1974). MSC: 57Q40 54C55 55P99 57N20 PDF BibTeX XML Cite \textit{L. Siebenmann} et al., Ann. Sci. Éc. Norm. Supér. (4) 7, 431--461 (1974; Zbl 0318.57011) Full Text: DOI Numdam EuDML
Siebenmann, L.; Guillou, L.; Hähl, H. Les voisinages ouverts réguliers. (French) Zbl 0294.57009 Ann. Sci. Éc. Norm. Supér. (4) 6, 253-293 (1973). MSC: 57N40 57N60 57N55 57Q40 PDF BibTeX XML Cite \textit{L. Siebenmann} et al., Ann. Sci. Éc. Norm. Supér. (4) 6, 253--293 (1973; Zbl 0294.57009) Full Text: DOI Numdam EuDML