Fetliński, Bartosz, Marcin Kieliszczyk, and Bartosz Janaszek. “Feasibility of Average Photon Energy (APE) in Performance Evaluation of PV Modules Equipped With IR Reflecting Filter”. Photonics Letters of Poland 16, no. 4 (December 31, 2024): 65–67. Accessed April 11, 2025. http://m.photonics.pl/PLP/index.php/letters/article/view/16-22.