Crowther, T. W.; Glick, H. B.; Covey, K. R.; Bettigole, C.; Maynard, D. S.; Thomas, S. M.; Smith, J. R.; Hintler, G.; Duguid, M. C. (2 Eylül 2015). "Mapping tree density at a global scale". Nature. advance online publication (7568): 201-205. Bibcode:2015Natur.525..201C. doi:10.1038/nature14967. ISSN1476-4687. PMID26331545.
Crowther, T. W.; Glick, H. B.; Covey, K. R.; Bettigole, C.; Maynard, D. S.; Thomas, S. M.; Smith, J. R.; Hintler, G.; Duguid, M. C. (2 Eylül 2015). "Mapping tree density at a global scale". Nature. advance online publication (7568): 201-205. Bibcode:2015Natur.525..201C. doi:10.1038/nature14967. ISSN1476-4687. PMID26331545.
"What is a tree?". Smartphone tour. University of Miami: John C. Gifford Arboretum. 2012. 20 April 2014 tarihinde kaynağından arşivlendi. Erişim tarihi: 23 Eylül 2014.
nih.gov
ncbi.nlm.nih.gov
Crowther, T. W.; Glick, H. B.; Covey, K. R.; Bettigole, C.; Maynard, D. S.; Thomas, S. M.; Smith, J. R.; Hintler, G.; Duguid, M. C. (2 Eylül 2015). "Mapping tree density at a global scale". Nature. advance online publication (7568): 201-205. Bibcode:2015Natur.525..201C. doi:10.1038/nature14967. ISSN1476-4687. PMID26331545.
"What is a tree?". Smartphone tour. University of Miami: John C. Gifford Arboretum. 2012. 20 April 2014 tarihinde kaynağından arşivlendi. Erişim tarihi: 23 Eylül 2014.
Crowther, T. W.; Glick, H. B.; Covey, K. R.; Bettigole, C.; Maynard, D. S.; Thomas, S. M.; Smith, J. R.; Hintler, G.; Duguid, M. C. (2 Eylül 2015). "Mapping tree density at a global scale". Nature. advance online publication (7568): 201-205. Bibcode:2015Natur.525..201C. doi:10.1038/nature14967. ISSN1476-4687. PMID26331545.