, Ortega Basagoiti, L.M.; Valenciano Veláz. “Some Examples of Application of Extensometry Techniques to Control Tests of Singular Structures”. Hormigón y Acero 41, no. 175 (January 3, 1990). Accessed May 18, 2024. http://www.hormigonyacero.com/index.php/ache/article/view/776.