Suprun , V. N., and V. M. Shurenkov. 1988. “Limited Distribution of Disposition of the Semi Continuous Process With a Negative Infinite Mean in the Moment of Output from the Interval”. Ukrains’kyi Matematychnyi Zhurnal 40 (4): 538-41. https://umj.imath.kiev.ua/index.php/umj/article/view/9197.