1. Aguilera RG. (2020) “Se hunde un parque infantil sobre un parking en Santander.” https://www. lavanguardia.com/sucesos/20200113/472858427145/hunde- parque-infantil-santander.html: 2020.
2. Punching-shear strength of reinforced concrete slabs subjected to unidirectional in-plane tensile forces;Fernández;Struct Concr,2020
3. Abrams, J.H. The Punching Shear Strength of Pre-cracked Reinforced Concrete in Biaxial Tension, M.S. Thesis Cornel University, May 1979. 1979.
4. Johnson RP, Arnouti C. Punching shear strength of concrete slabs subjected to in-plane biaxial tension, Magaz Concr Res, 1980;32(110).
5. Jau WC, White RN, Gergely P. Behavior of reinforced concrete slabs subjected to combined punching shear and biaxial tension. Report, September 1, 1982; United States. 1982 (https://digital.library.unt.edu/ark:/67531/metadc1199905/m1/1/:accessed March 12, 2020), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.