1. Albanesi E, Gugliotta O I, Mercurio I, Mercurio R. 2005. Effects of gap size and within-gap position on seedlings establishment in silver fir stands. iForest, 2(4): 358–366
2. Attiwill P M. 1994. The disturbance of forest ecosystems: the ecological basis for conservative management. Forest Ecol Manage, 63: 247–300
3. Bianchi L, Giovannini G, Maltoni A, Mariotti B, Paci M. 2005. La selvicoltura delle pinete della Toscana. Firenze: Arsia, 173
4. Boudru M. 1989. Foret et Sylvicul ture: Traitement des Forets. Gembloux, Belgiqu e: Les Presses Agronomiques de Gembloux, 356
5. Bjørnstad E. 2005. An engineering economics approach to the estimation of forest fuel supply in North-Trøndelag County, Norway. J Forest Econ, 10: 161–188