ZHANG, W., F. XU, H. CHENG, L. LI, F. CAO, and S. CHENG. “Effect of Chlorocholine Chloride on Chlorophyll, Photosynthesis, Soluble Sugar and Flavonoids of Ginkgo Biloba”. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, Vol. 41, no. 1, May 2013, pp. 97-103, doi:10.15835/nbha4118294.