Fernandes, S. C., Barros, R. P., Freitas, H. da S., Barros, L. M., & Alencar, D. B. de. (2019). Comparative Study of Steel Economy on fck-25 MPa and fck-50 MPa Reinforced Concrete Pillars in a 4-Story Building. International Journal of Advanced Engineering Research and Science, 6(12). https://journal-repository.com/index.php/ijaers/article/view/1455