1. Semiconductor gas sensors;Morrison;Sensors and Actuators,1982
2. Homogeneous semiconducting gas sensors;Heiland;Sensors and Actuators,1982
3. A gas detector element in which a phthalocyanine vapour deposited film is used;Sadaoka;Denki Kagaku,1978
4. A highly sensitivity NO2 sensor based on electrical conductivity changes in phthalocyanine films;Bott;Sensors and Actuators,1984