TY - JOUR TI - Extended exergy-based urban ecosystem network analysis: a case study of Beijing, China PY - 2010 AU - Gengyuan Liu AU - Zhifeng Yang AU - Bin Chen T2 - Procedia Environmental Sciences LK - http://www.sciencedirect.com/science/article/pii/S1878029610000629 DO - 10.1016/j.proenv.2010.10.029 ER -