Stávek, Jiří. “What Is Hidden in the Planck Distribution Function and the Wien´s Peaks? III. Fission of Solar Photons into Thermons (‘Dark Heat’)”. European Journal of Applied Physics 5, no. 2 (March 31, 2023): 17–25. Accessed April 21, 2025. https://ej-physics.org/index.php/ejphysics/article/view/242.