Quotient Module of Z-module
Futa, Yuichi, Okazaki, Hiroyuki, Shidama, Yasunari
Compactness in Metric Spaces
Nakasho, Kazuhisa, Narita, Keiko, Shidama, Yasunari
Bidual Spaces and Reflexivity of Real Normed Spaces
Narita, Keiko, Endou, Noboru, Shidama, Yasunari