Vassallo, J. M., T. Rangel, M. de los Ángeles Baeza, and P. C. Bueno. “The Europe 2020 Project Bond Initiative: An Alternative to Finance Infrastructure in Europe”. Technological and Economic Development of Economy, vol. 24, no. 1, Jan. 2018, pp. 229-52, doi:10.3846/20294913.2016.1209251.