1. Cai YL, Lin HC (2018) An empirical test of the impact of urbanization of Chinese urban agglomerations on the income gap between urban and rural residents. Stat Decis 34(23):140–144
2. Dai CY, Yuan JH, Zhang FH, Chen X, Zhang H (2017) Study on output characteristic of photovoltaic array based on DMPPT. Chin J Power Sour 41(2):253–256
3. Engström E, Mörtberg U, Karlström A, Mangold M (2017) Applying spatial regression to evaluate risk factors for microbiological contamination of urban groundwater sources in Juba, South Sudan. Hydrogeol J 25(4):1077–1091
4. Fu ZH, Mei L, Liu YJ, Zheng RM (2019) The spatial pattern and differentiation mechanism of urban-rural income gap in the three provinces of Northeast China. Geogr Sci 39(09):115–125
5. Gao Z, Zhu X, Jian S, Luo Z, Bao C, Tang C, Ma J (2017) Spatial evolution of Zn-Fe-Pb isotopes of sphalerite within a single ore body: a case study from the Dongshengmiao ore deposit, Inner Mongolia, China. Mineral Deposita 53:55–65