Chengliang, Du, Yongsheng Zhou, Fuping Gan, and Yinxiang Chen. 2020. “Investigation of Karst Collapses Using Integrated Geophysical Methods: An Example from Conghua District, Guangzhou City, China”. Acta Carsologica 49 (2-3). Ljubljana, Slovenija. https://doi.org/10.3986/ac.v49i2-3.7786.