1. Brandl, H., 1998. Energy piles and diaphragm walls for heat transfer from and into ground, 3rd International Geotechnical Seminar, Deep Foundations and Auger Piles (BAP III). University of Ghent. W. F. Van Impe (Ed.). Proc.: A.A. Balkema, Rotterdam, pp. 37-60.
2. Brandl, H., 2006. Energy foundations and other thermo-active ground structures. (Rankine-Lecture). Géotechnique, Vol. LVI 2, pp. 81-122.
3. Markiewicz, R., 2004. Numerische und experimentelle Untersuchungen zur Nutzung von geothermischer Energie mittels erdberührter Bauteile und Neuentwicklungen für den Tunnelbau. Doctoral Thesis. Institute for Soil Mechanics and Geotechnical Engineering, Vienna University of Technology.