WASET
    Zhang Yu and  Ding Yi,  The Study on the Overall Protection of the Ancient Villages.   journal   = {International Journal of Urban and Civil Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2018, vol. 136(4). 443 - 447
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/10008857.