Fattahi, M., and S. Stokes. “Photomultiplier and Filter Combinations for the Detection of Relatively Long Wavelength (>600 Nm) Luminescence Emissions from Feldspar”. Ancient TL 21, no. 1 (June 15, 2003): 25–34. Accessed June 16, 2025. https://www.ancienttl.org/article/view/6621.