Putz, Francis E.; Redford, Kent H.. (2009-09-14). «The Importance of Defining 'Forest': Tropical Forest Degradation, Deforestation, Long-term Phase Shifts, and Further Transitions» Biotropica (Wiley) 42 (1): 10–20. doi:10.1111/j.1744-7429.2009.00567.x. ISSN0006-3606..
Putz, Francis E.; Redford, Kent H.. (2009-09-14). «The Importance of Defining 'Forest': Tropical Forest Degradation, Deforestation, Long-term Phase Shifts, and Further Transitions» Biotropica (Wiley) 42 (1): 10–20. doi:10.1111/j.1744-7429.2009.00567.x. ISSN0006-3606..