Wong, H. Y. (1966). Infiltration of water into unsaturated soils [master's thesis, The University of Hong Kong]. Airiti Library. https://www.airitilibrary.com/Article/Detail?DocID=U0029-1812201200008670
Zartman, R. E., Moffet, C. A., Wester, D. B., Sosebee, R. E., Fish, E. B., & Jaynes, W. F. (2012). Influence of Surface Biosolids Application on Infiltration. Applied and Environmental Soil Science, 2012(), 430-438. https://doi.org/10.1155/2012/642791