C. Huber, T.-A. Nguyen, C. Krause, and A. Stangelmayer, “Oxygen Ingress Measurement into PET Bottles using Optical-Chemical Sensor Technology”, BrSc, vol. 60, no. 11/12, pp. 5–15, Dec. 2006, Accessed: May 30, 2026. [Online]. Available: https://brewingscience.de/index.php/brewingscience/article/view/504