1. Åstrand, B. (2005). Vision based perception for mechatronic weed control. Published Ph.D. dissertation, Department of Computer Science and Engineering, Chalmers University of Technology, Göteborg.
2. Bond, W., & Grundy, A. C. (2001). Non-chemical weed management in organic farming systems. Weed Research, 41, 383–405.
3. Bontsema, J., van Asselt, C. J., Lempens, P. W. J., & van Straten, G. (1998). Intra-row weed control: A mechatronics approach. In N. Sigrimis & P. Groubos (Eds.), Control applications and ergonomics in agriculture, Proceedings 1st IFAC Workshop (pp. 93–97). Athens Greece.
4. Griepentrog, H. W., Noerremark, M., Nielsen, H., & Blackmore, B. S. (2003). Individual plant care in cropping systems. In J. V. Stafford & A. Werner (Eds.), In: Proceedings of the 4th European Conference on Precision Agriculture (pp. 247–251). Wageningen: Wageningen Academic Press.
5. Griepentrog, H. W., Noerremark, M., Nielsen, J., & Soriano Ibarra, J. (2007). Autonomous inter-row hoeing using GPS based side-shift control. Agricultural Engineering International. The CIGR Ejournal IX (Manuscript ATOE 07 005).