1. Attfield, E. M.; Evans, P. K. Developmental patterns of root and shoot organogenesis in cultured leaf explants ofNicotiana tabacum cv. Xanthi nc. J. Exp. Bot. 42:51–57; 1991.
2. Bonga, J. M.; von Aderkas, P. In vitro culture of trees. Dordrecht, The Netherlands: Kluwer Academic Publishers; 1992:1–3.
3. Burger, D. W.; Liu, L.; Wu, L. Rapid micropropagation ofPaulownia tomentosa. HortSci. 20(4):760–761; 1985.
4. Chevreau, E.; Skirvin, R. M.; Abu-Qaoud, H. A., et al. Adventitious shoot regeneration from leaf tissue of three pear (Pyrus sp.) cultivars in vitro. Plant Cell Rep. 7:688–691; 1989.
5. Fan, M. L.; Hu, T. W. Plantlests fromPaulownia tissue culture. Bull. no. 286. Taipei, Taiwan: Forestry Research Institute; 1976:6.