Endurance tests of a low power arcjet thruster with hydrogen/nitrogen propellant mixture : Rep.presented at AIAA/DGLR/JSASS 21st international electric propulsion conf.,July 18-20,1990,Orlando,Fl. / T.Yoshikawa,K.Onoe,Y.Yasuda и др., 1990. - 7 p. - Текст : непосредственный.
Water Civilization. From Yangtze to Khmer Civilizations / ed. Y. Yasuda, 2013 r=on-line. - Текст : электронный.