Wilkinson, R.
, Garris, M.
and Geist, J.
(1992),
Machine-Assisted Human Classification of Segmented Characters for OCR Testing and Training, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=900672
(Accessed February 11, 2025)