Stojanov, V. V., S. J. Jgalli, and V. O. Stojanov. “THE CONSTITUENT ELEMENTS STRUCTURES COVERING OF HYPERBOLIC PARABOLOID”. Academic journal. Industrial Machine, Building Civil Engineering 1, no. 48 (March 27, 2017): 54–61. Accessed June 21, 2026. https://journals.nupp.edu.ua/znp/article/view/769.