Gheibi, Ali, SojoudiZadeh, Reza, Azizian, Hadi, Gheibi, Mahdi (2024). Sizing optimization of truss structures with discrete design variables using combined PSO algorithm with Special Particles Method. *Journal of Optimization in Industrial Engineering*, 16(2), 295-302. 10.22094/joie.2024.1973228.2014