, T. P. J. M. B. P. D. “Determination of the Effective Length Coefficient (K) of Columns of Spatial Segments in Metallic Sheds, Making Use of Microcomputers”. Hormigón Y Acero, Vol. 38, no. 164, Jan. 1987, http://www.hormigonyacero.com/index.php/ache/article/view/911.