1. IUSS Working Group WRB. World reference base for soil resources 2014, update 2015. International soil classification system for naming soils and creating legends for soil maps. World Soil Resources Reports No 106. Rome, Italy: Food and Agricultural Organization (2015).
2. Schaefer, C. E. G. R. Brazilian latosols and their B horizon microstructure as long-term biotic constructs. Aust. J. Soil Res. 39, 909–926 (2001).
3. Schaefer, C. E. G. R. & Delrymple, J. Landscape evolution in Roraina, North Amazonia: Plantation, paleosols and paleoclimates. Zeitschrift fur Geomorphologie 39, 1–28 (1995).
4. Scholten, T., Felix-Henningsen, P. & Schotte, M. Geology, soils sans saprolites of the Swaziland Middleveld. CATENA 11, 229–246 (1997).
5. van Wambeke, A. Soils of the Tropics: Properties and appraisal (McGraw-Hill, 1992).