, Martínez Calzón, J. 1995. “Enlargement of the Spans of 15 Continuous Prestressed Concrete Overpass to Spans at Six Lanes the A-7 Highway Barcelona-La Junquera. Sectio: Hostalric-Maçanet”. Hormigón Y Acero 46 (196). http://hormigonyacero.com/index.php/ache/article/view/525.