Tham khảo Chữ viết tay

  1. ↑ Handwriting Identification: Facts and Fundamentals 
  2. ↑ Sargur Srihari, Chen Huang and Harish Srinivasan. On the Discriminability of the Handwriting of Twins. J Forensic Sci. 2008 Mar;53(2):430-46. http://www.cedar.buffalo.edu/~srihari/papers/TR-04-07.pdf.Retrieved ngày 25 tháng 1 năm 2015
  3. ↑ M.L. Kaiser, M.M. Schoemaker, J.M. Albaret, R.H. Geuze. What is the evidence of impaired motor skills and motor control among children with attention deficit hyperactivity disorder (ADHD)? Systematic review of the literature. Research in Developmental Disabilities. Volume 36, January 2015, Pages 338–357. doi:10.1016/j.ridd.2014.09.023.