Putz, Francis E.; Redford, Kent H. (14 de septiembre de 2009). «The Importance of Defining 'Forest': Tropical Forest Degradation, Deforestation, Long-term Phase Shifts, and Further Transitions». Biotropica (Wiley) 42 (1): 10-20. ISSN0006-3606. doi:10.1111/j.1744-7429.2009.00567.x.
Putz, Francis E.; Redford, Kent H. (14 de septiembre de 2009). «The Importance of Defining 'Forest': Tropical Forest Degradation, Deforestation, Long-term Phase Shifts, and Further Transitions». Biotropica (Wiley) 42 (1): 10-20. ISSN0006-3606. doi:10.1111/j.1744-7429.2009.00567.x.