@article{oai:tsukuba.repo.nii.ac.jp:00029811,
 author = {Chatyrko, Vitalij A.},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {401--413},
 title = {Subspaces of the Sorgenfrey line and their products},
 volume = {30},
 year = {2006}
}