"K.Uehara,K.Yamamoto,T.Kikugawa,S.Toyoda,K.Tsuji,N.Yoshida","Precise Isotope Abundance Ratio Measurement of Nitrous Oxide Using Diode Lasers",,"Sensors and Actuators B: Chemical",,"Vol. 90","No. 1-3","pp. 250-255",2003, "S. FUJIKAWA,K. TSUJI,K. YAMAMOTO,K. UEHARA,T. KIKUGAWA,N. YOSHIDA","Carbon isotope analysis of methane by new laser-spectroscopic method","48th Annual Meeting of the Geochemical Society of Japan 2001","Proceedings of Annual Meeting of the Geochemical Society of Japan 2001",,,,"pp. 248",2001,