Carpinus betulus L. - Detailed coloured botanic drawings of the foliage, flowers and fruit. Flora von Deutchland. herba.msu.ru/pictures/Flora_von_Deutchland/pages/162.htm
Carpinus betulus L. (hornbeam) - Index to a number of closeup photographs of the plant. www.bioimages.org.uk/HTML/R60770.HTM
