HUBER, Roy A. - HEADRICK, A. M. Handwriting identification : facts and fundamentals. Boca Raton : CRC Press, [1999]. ©1999. xix, 435 stran. Dostupné na internetu: <http://www.gbv.de/dms/bowker/toc/9780849312854.pdf> ISBN 0-8493-1285-X.