1. Clear Path Robotics. (2017). Retrieved fromhttps://www.clearpathrobotics.com.
2. Agisoft. (2017).PhotoScan Professional version 1.4.1. Retrieved fromhttp://www.agisoft.com/downloads/installer.
3. Least-Squares Fitting of Two 3-D Point Sets
4. Industrial applications of radioisotopes;Barbour W. E.;The Analysts Journal,1957
5. Belkin M. &Niyogi P.(2002 December).Laplacian eigenmaps and spectral techniques for embedding and clustering. NIPS'01 Proceedings of the 14th International Conference on Neural Information Processing Systems: Natural and Synthetic Vancouver British Columbia Canada: MIT Press Cambridge MA. pp. 585–591.