@article{oai:tsukuba.repo.nii.ac.jp:00015722,
 author = {Tanaka, Hidenori},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {503--512},
 title = {A class of spaces whose countable product with a perfect paracompact space is paracompact},
 volume = {16},
 year = {1992}
}