Search for: [References = "Yang Z., Zhang Y., Li S., Liu H., Zheng H., Zhang J., Su M., Liu G., 2014. Characterizing urban metabolic systems with an ecological hierarchy method, Beijing, China. Landscape and Urban Planning, vol. 121, pp. 19\-33. https\:\/\/doi.org\/10.1016\/j.landurbplan.2013.09.004"]