Gečiauskas, E. “The Method of the Integral Geometry for Finding the Distribution Functions of Chord Length of an Oval and of Distance in an Oval”. Lithuanian Mathematical Journal 8, no. 2 (April 7, 1968): 237–241. Accessed May 3, 2025. https://www.zurnalai.vu.lt/LMJ/article/view/20212.