1. Avakjan, A. A., and N. G. Jastreb, Hybridisation by means of grafts. Jarovisacia 1941: 1: 50–57 (Russian).
2. Alexander, L. J., and M. M. Hoover, Progress report of National Screening Committee for disease resistance in the tomato for 1952. Plant Dis. Reptr., Washington, 37 (1953): 317–324.
3. Baldin, P. G., Vegetative hybridisation of the tomato. Agrobiology, Moscow 1952: 4: 142–145.
4. Bateman, A. J., Grafting experiments between the tomato varieties Golden Apple and Oxheart. Nature 175 (1955): 1118–1120.
5. Böhme, H., Untersuchungen zum Problem der genetischen Bedeutung von Pfropfungen zwischen genotypisch verschiedenen Pflanzen. Z. Pflanzenz. 33 (1954): 367–418.