Specific impulse comparison of high density hydrocarbon fuel burned with oxygen / T.Kumagai,S.Ueda,M.Sato и др., 1990. - 16 p. - Текст : непосредственный.
Kumagai T. In-orbit performance tests and tele-command systems of the umbrella test satellite (DEBUT) / T.Kumagai,A.Nakajama,Y.Sakurai, 1992. - 25 p. - Текст : непосредственный.
Kumagai T. Visualization of hydrogen-bond dynamics. Water-based model systems on a Cu(110) surface / T. Kumagai, 2012 r=on-line. - Текст : электронный.