Y. Miyazaki et al., “Preventive Medical Effects of Nature Therapy,” Nihon Eiseigaku Zasshi 66, no. 4 (September 2011): 651–56.
457
G. N. Bratman et al., “Nature Experience Reduces Rumination and Subgenual Prefrontal Cortex Activation,” Proceedings of the National Academy of Sciences of the United States of America 112, no. 28 (July 14, 2015): 8567–72, doi: 10.1073/pnas.1510459112.