C. Spirchez, A. Lunguleasa, and M. Matei, “Particularities of hollow-core briquettes obtained out of spruce and oak wooden waste”, Maderas-Cienc Tecnol, vol. 20, no. 1, pp. 139–152, Jan. 2018, Accessed: Nov. 08, 2026. [Online]. Available: https://revistas.ubiobio.cl/index.php/MCT/article/view/3016