1. W.G. Phillips, Carbon monoxide detectors, Popular Sci. January (1998) 75–81.
2. D.D. Lee, W.Y. Chung, T.H. Kim, J.M. Baek, Low power micro gas sensor, The Eighth International Conference on Solid-State Sensors and Actuators (Transducers ’95), (1995) 827–830.
3. T. Takada, H. Shiozawa, H. Kobayashi, H. Tanjou, A. Furukawa, Miniaturized hot wire type semiconductor gas sensor operated with a small battery, Eighth International Fair and Congress for Sensors, Transducers and Systems (Sensor ’97), 1 (1997) 159–164.
4. K. Tanaka, S. Matsumoto, M. Ito, K. Onaga, Development of semiconductor CO sensor for battery operation, Eighth International Fair and Congress for Sensors, Transducers and Systems (Sensor ’97), 1 (1997) 131–135.
5. M. Kitora, T. Amamoto, Y. Matsuura, Y. Kajiyama, Characteristics of pulse drive semiconductor gas sensor, Proceedings of the Seventeenth Chemical Sensor Symposium, (1993) 106–109.