Lyakhovich, L. et al. 2020. ASSESSMENT OF THE PROXIMITY OF DESIGN TO MINIMUM MATERIAL CAPACITY SOLUTION OF PROBLEM OF OPTIMIZATION OF THE FLANGE WIDTH OF I-SHAPED CROSS-SECTION RODS WITH ALLOWANCE FOR STABILITY CONSTRAINTS OR CONSTRAINTS FOR THE VALUE OF THE FIRST NATIONAL FREQUENCY AND STRENGTH REQUIREMENTS. International Journal for Computational Civil and Structural Engineering. 16, 2 (Jun. 2020), 71–82. DOI:https://doi.org/10.22337/2587-9618-2020-16-2-71-82.