Berezansky, Y. M., E. V. Lytvynov, and D. A. Mierzejewski. “The Jacobi Field of a Lévy Process”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 55, no. 5, May 2003, pp. 706-10, https://umj.imath.kiev.ua/index.php/umj/article/view/3945.