W. Liao, B. Rosenhahn, und Y. Michael. International Society for Photogrammetry and Remote Sensing ISA workshop, La Grande Motte, France, (September 2015)
Y. Huang, Y. Liao, S. Li, M. Wu, C. Chen, und W. Su. Solar Energy Materials and Solar Cells, 93 (6–7):
888 - 892(2009)17th International Photovoltaic Science and Engineering Conference.