1. Covering properties in products;Chiba;Math. Japon.,1989
2. The submetacompactness of σ-products;Chiba;Math. Japon.,1991
3. Normality of σ-products;Chiba;Proc. Amer. Math. Soc.,1993
4. Covering properties in σ-products;Chiba;Math. Japon.,1994
5. The strong paracompactness of σ-products;Chiba;Sci. Math.,1999