Ziaja, Dominika, and Zenon Waszczyszyn. “Soft Methods in the Prediction and Identification Analysis of Axially Compressed R C Columns”. Computer Assisted Methods in Engineering and Science, vol. 21, no. 1, Jan. 2017, pp. 59-66, https://cames3.ippt.pan.pl/index.php/cames/article/view/55.