Chengliang, Du, Yongsheng Zhou, Fuping Gan, and Yinxiang Chen. “Investigation of Karst Collapses Using Integrated Geophysical Methods: An Example from Conghua District, Guangzhou City, China”. Acta Carsologica 49, no. 2-3 (December 16, 2020). Accessed January 24, 2022. https://ojs.zrc-sazu.si/carsologica/article/view/7786.