por Universidad Central de Venezuela. Instituto de Materiales y Modelos Estructurales.
por American Institute of Steel Construction.
por Instituto Superior Politecnico "Jose Antonio Echeverria".
por American Society of Civil Engineers.
por American Society of Civil Engineers | Technical Council on Forensic Engineering - American Society of Civil Engineers | Architecture and Engineering Performance Information Center | Professional Engineers in Private Practice.
por American Society of Civil Engineers | American Society of Civil Engineers. Structural Division | Structural Engineering Institute.
por Institution of Civil Engineers (Gran Bretaña).
por Institution of Structural Engineers.