1. BOXUS, Ph. 1974. The production of strawberry plants by in-vitro micro-propagation, J. Hort. Sci. 49: 209-210.
2. EARLE, E. D. and R. W. LANGHANS. 1974. Propagation of Chrysanthemum in vitro. I. Multiple plantlets from shoot tips and the establishment of tissue cultures. J. Amer. Soc. Hort. Sci. 99: 128-132.
3. EARLE, E. D. and R. W. LANGHANS. 1974, Propagation of Chrysanthemum in vitro: II. Production, growth and flowering of plantlets from tissue cultures. J. Amer. Soc. Hort. Sci. 99: 352-358.