Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kato Hisao and Matsumoto Masahiro,Characterizations of topological dimension by use of normal sequences of finite open covers and Pontrjagin-Schnirelmann theorem,Journal of the Mathematical Society of Japan,00255645,The Mathematical Society of Japan,2011,63,3,919-976,https://cir.nii.ac.jp/crid/1390282680092645888,https://doi.org/10.2969/jmsj/06330919