Tsyba, Vyacheslav. “Depth of Sharpness, or The Twists and Turns of the Phenomenological Self-Reflection”. Sententiae 27, no. 2 (December 16, 2012): 208-213. Accessed July 23, 2019. https://sententiae.vntu.edu.ua/index.php/sententiae/article/view/144.