Greene, R. E. Homotopy finiteness theorems and Helly’s theorem. (English) Zbl 0803.53027 J. Geom. Anal. 4, No. 3, 317-325 (1994). MSC: 53C20 PDF BibTeX XML Cite \textit{R. E. Greene}, J. Geom. Anal. 4, No. 3, 317--325 (1994; Zbl 0803.53027) Full Text: DOI OpenURL
Cheeger, Jeff Critical points of distance functions and applications to geometry. (English) Zbl 0771.53015 Geometric topology: recent developments, Lect. 1st Sess. CIME, Montecatini Terme/Italy 1990, Lect. Notes Math. 1504, 1-38 (1991). Reviewer: P.Eberlein (Chapel Hill) MSC: 53C20 PDF BibTeX XML Cite \textit{J. Cheeger}, Lect. Notes Math. 1504, 1--38 (1991; Zbl 0771.53015) OpenURL