Fu, L., Xin, Y. & Whittemore, A. (2002). Ulmaceae, in Wu, Z. & Raven, P. (eds) Flora of China, Vol. 5 (Ulmaceae through Basellaceae). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, USA; also available as Fu, L.; Xin, Y. & Whittemore, A. "Ulmus parvifolia". Flora of China. Missouri Botanical Garden, St. Louis, Missouri & Harvard University Herbaria, Cambridge, Massachusetts. Retrieved 5 February 2015.
harvard.edu
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Fu, L., Xin, Y. & Whittemore, A. (2002). Ulmaceae, in Wu, Z. & Raven, P. (eds) Flora of China, Vol. 5 (Ulmaceae through Basellaceae). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, USA; also available as Fu, L.; Xin, Y. & Whittemore, A. "Ulmus parvifolia". Flora of China. Missouri Botanical Garden, St. Louis, Missouri & Harvard University Herbaria, Cambridge, Massachusetts. Retrieved 5 February 2015.
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Mittempergher, L; Santini, A (2004). "The history of elm breeding"(PDF). Investigacion Agraria: Sistemas y Recursos Forestales. 13 (1): 161–177. Archived from the original(PDF) on 11 February 2017. Retrieved 4 اكتبر 2022. {{cite journal}}: Check date values in: |access-date= (help)
Mittempergher, L; Santini, A (2004). "The history of elm breeding"(PDF). Investigacion Agraria: Sistemas y Recursos Forestales. 13 (1): 161–177. Archived from the original(PDF) on 11 February 2017. Retrieved 4 اكتبر 2022. {{cite journal}}: Check date values in: |access-date= (help)
