Yunchao, Z., W. Shi-jie, L. Hong-mei, X. Liping, and X. De’an. “Forest Soil Heterogeneity and Soil Sampling Protocols on Limestone Outctops: Example from SW China”. Acta Carsologica, vol. 39, no. 1, Apr. 2010, doi:10.3986/ac.v39i1.117.