1. See for example: “Air quality guidelines” – World Health Organization – http://www.who.int/.
2. ASHRAE, Standard 62-1999, Ventilation for acceptable indoor air quality, American Society of Heating, Refrigeration and Air-Conditioning Engineers, Atalanta, 1999 – see http://www.ashrae.org/.
3. Sensor-based demand-controlled ventilation: a review;Fisk;Elsevier Energy Build.,1998
4. An Electronic Nose based on Solid State Sensor Arrays for low-cost Indoor Air Quality Monitoring Applications;Zampolli;Elsevier Sens. Actuators B: Chem.,2004
5. Application of a membrane reactor and an ultra-short packed gas chromatographic column to optimize the gas selectivity for a resistive thin film gas sensor;Stürmann,2003