Bueis, T., F. Bravo, V. Pando, and M. B. Turrión. “Effects of Stand Density on Litterfall and Its Turnover in Pine Plantations in Northern Spain”. Revista Bosque, vol. 38, no. 2, Oct. 2017, pp. 401-7, https://revistabosque.org/index.php/bosque/article/view/434.