(2010. augusztus 4.) „A systematic review of evidence for the added benefits to health of exposure to natural environments”. BMC Public Health10 (1), 456. o. DOI:10.1186/1471-2458-10-456. PMID20684754. PMC2924288.
(2010. augusztus 4.) „A systematic review of evidence for the added benefits to health of exposure to natural environments”. BMC Public Health10 (1), 456. o. DOI:10.1186/1471-2458-10-456. PMID20684754. PMC2924288.
(2010. augusztus 4.) „A systematic review of evidence for the added benefits to health of exposure to natural environments”. BMC Public Health10 (1), 456. o. DOI:10.1186/1471-2458-10-456. PMID20684754. PMC2924288.