Hauser, Peter C., Carlo Colombo, Alexia W.E. Hodgson, Patrick Jacquinot, Thomas Kappes, and Richard Stratz. “Robust Chemical Sensors for Environmental Analysis and Process Control”. CHIMIA 53, no. 3 (March 31, 1999): 109. Accessed March 28, 2024. https://www.chimia.ch/chimia/article/view/1999_109.