Chen, Erming; Fu, Peiren A problem concerning Lindelöf spaces. (Chinese. English summary) Zbl 0979.54502 J. Nat. Sci. Heilongjiang Univ. 7, No. 2, 17-19 (1990). MSC: 54D20 Noncompact covering properties (paracompact, Lindelöf, etc.) PDF BibTeX XML Cite \textit{E. Chen} and \textit{P. Fu}, J. Nat. Sci. Heilongjiang Univ. 7, No. 2, 17--19 (1990; Zbl 0979.54502)