Roberts, R. G., N. A. Spooner, and D. G. Questiaux. “Cautions on the Use of Extended Duration Preheats in the Optical Dating of Quartz”. Ancient TL 11, no. 2 (October 15, 1993): 47–54. Accessed June 16, 2025. https://www.ancienttl.org/article/view/6479.