Muzaffar Bashir and  J├╝rgen Kempf,  Reduced Dynamic Time Warping for Handwriting Recognition Based on Multidimensional Time Series of a Novel Pen Device.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2008, vol. 21(9). 1839 - 1845
    [viewed 16 October 2021]. Available from: https://publications.waset.org/pdf/13639.