1. Teaotia, S. S. (1953). Studies on fruit development and fruit drop in black currants. Ph.D. Thesis, University of Bristol.
2. Wittwer, S. H. (1943). Growth hormone production during sexual reproduction of higher plants with special reference to synapsis and syngamy. Mo. agric. exp. Stn. Res. Bull. 371, 1–58.
3. Wright, S. T. C. (1954). A chromatographic study of auxins in relation to fruit morphogenesis and fruit drop in black currant (Ribes nigrum). Ph.D. Thesis, University of Bristol.
4. Vyvyan, M. C. (1946). Fruit fall and its control by synthetic growth substances. Imperial Bureau of Horticulture and Plantation Crops. Tech. Comm., No. 18.