Putz, Francis E.; Redford, Kent H. The Importance of Defining 'Forest': Tropical Forest Degradation, Deforestation, Long-term Phase Shifts, and Further Transitions. Biotropica (Wiley). September 14, 2009, 42 (1): 10–20. ISSN 0006-3606. doi:10.1111/j.1744-7429.2009.00567.x.
Putz, Francis E.; Redford, Kent H. The Importance of Defining 'Forest': Tropical Forest Degradation, Deforestation, Long-term Phase Shifts, and Further Transitions. Biotropica (Wiley). September 14, 2009, 42 (1): 10–20. ISSN 0006-3606. doi:10.1111/j.1744-7429.2009.00567.x.