Roe E and Mello C.
(2009). Simulating inertial and centripetal forces for segmentation of overlapped handwritten digits 2009 IEEE International Conference on Systems, Man and Cybernetics - SMC. 10.1109/ICSMC.2009.5346570. 978-1-4244-2793-2. (143-147). http://ieeexplore.ieee.org/document/5346570/