1. (1) S. Omatu, H. Araki, T. Fujioka, M. Yoshioka, and H. Nakazumi : “Mixed odor classification for QCM sensor data by neural networks”, Advances in Intelligent and Soft Computing, Vol. 151, pp. 1-8 (2012)
2. (2) Y. Yoshioka, T. Fujinaka, and S. Omatu : “Intelligent electronic nose systems with metal oxide gas sensors for fire detection”, Intern'l J. on Adv. in Intelligent Sys., Vol. 2, No. 1, pp. 268-277 (2009)
3. (3) H-K. Hong, C. H. Kwon, S-R Kim, D. H. Yun, K. Lee, and Y. K. Sung, “Portable electronic nose system with gas sensor array and artificial neural network”, Sensors and Actuators, Vol. B66, pp. 49-52 (2000)
4. (4) J. Terada, Y. Hirahara, S. Omatu, S. Sasa, and M. Yano : “Characteristics of p-Type MgCr2O4-TiO2:WO3 ceramics for gas sensing applications”, J. Soc. Mat. Sci., Jpn., Vol. 62, No. 11, pp. 683-688 (2013) (in Japanese)
5. (5) J. Terada, Y. Hirahara, S. Omatu, S. Sasa, and M. Yano : “Characteristics of p-type (Zn1-xMgx)Cr2O4-TiO2 ceramics for gas-sensing applications”, IEEJ Trans. SM, Vol. 134, No. 9, pp. 308-314 (2014) (in Japanese)