@phdthesis{oai:tsukuba.repo.nii.ac.jp:00008423,
 author = {陳, 懐鵬 and Chen, Huaipeng},
 month = {},
 note = {In this thesis, we show some results on quotient s-images of metric spaces. Firstly we prove that if a Hausdorff space Y is a quotient s-image of a metric space, then Y has a poin-countable base if and only if Y contains no closed copy of Sw and no S2. This gives a positive answer to a question of Y.Tanaka [35]. Then we prove that if a regular T1 space Y has ..., 1998},
 school = {筑波大学, University of Tsukuba},
 title = {On quotient s-images of metric spaces},
 year = {1999}
}