Alcalde Fradejas, N., and M. Ramírez Alesón. “Long-Run Profits in Times of Crisis: A Comparison Between European SMEs and Large Companies”. Estudios De Economía, vol. 42, no. 1, Sept. 2015, pp. pp. 79-97, https://estudiosdeeconomia.uchile.cl/index.php/EDE/article/view/37258.