Towards a standard for soil and terrain data exchange: SoTerML. - Amir Pourabdollah; Didier G. Leibovici; Daniel M. Simms; Piet Tempel; Stephen H. Hallett; Mike J. Jackson (Comput. Geosci., 2012)

Development of Global Soil Information Facilities. - Niels H. Batjes; Hannes Isaak Reuter; Piet Tempel; Tomislav Hengl; Johan G. B. Leenaars; Prem S. Bindraban (Data Sci. J., 2013)