@article{TUW-182196, author = {Karimipour, Farid and Delavar, M and Frank, Andrew U.}, title = {An Algebraic Approach to Extend Spatial Operations to Moving Objects}, journal = {World Applied Sciences Journal}, year = {2009}, volume = {6}, number = {10}, numpages = {7}, url = {http://publik.tuwien.ac.at/files/PubDat_182196.pdf} }