Lin'kov, Yu. N., and A. Yu. Shevlyakov. “Properties of the Likelihood Ratio for Semimartingales With Deterministic Triplets in the Parametric Case”. Ukrains’kyi Matematychnyi Zhurnal, vol. 51, no. 9, Sept. 1999, pp. 1172–1180, https://umj.imath.kiev.ua/index.php/umj/article/view/4713.