Vahonova, A. H., T. A. Jerokhondyna, and O. O. Shashenko. “AN ECONOMIC-AND-MATHEMATICAL MODEL OF OPENING PARAMETERS OF PREPARATION WORKS”. Science and Transport Progress , no. 32 (May 25, 2010): 21–25. Accessed December 11, 2024. https://stp.ust.edu.ua/article/view/13137.