@article{oai:tsukuba.repo.nii.ac.jp:00017197,
 author = {Charatonik, Janusz J. and Charatonik, Wlodzimierz J.},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {179--192},
 title = {Lightness of induced mappings},
 volume = {22},
 year = {1998}
}