Spichiger-Keller, Ursula E., Caspar Demuth, Alphons Fakler, Luzi Jenny, Michael Linnhoff, Christian Lohse, Gerhard J. Mohr, et al. 1999. “Advanced Materials and Measuring Techniques for Chemical Sensors”. CHIMIA 53 (3):91. https://doi.org/10.2533/chimia.1999.91.