Bruce W. CharStephen M. WattRepresenting and Characterizing Handwritten Mathematical Symbols through Succinct Functional Approximation.1198-12022007conf/icdar/2007ICDARhttps://doi.org/10.1109/ICDAR.2007.4377105https://doi.ieeecomputersociety.org/10.1109/ICDAR.2007.218db/conf/icdar/icdar2007.html#CharW07