Pilipenko, A. Y. “On the Skorokhod Mapping for Equations With Reflection and Possible Jump-Like Exit from a Boundary”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 63, no. 9, Sept. 2011, pp. 1241-56, https://umj.imath.kiev.ua/index.php/umj/article/view/2801.