ANON (1991): Forestry statistics today for tomorrow. Wood and wood products 1961-1989: 2010. Food and Agriculture Organization of the United Nations, Rome.
BURTON, G. W. and E. H. DEVANE (1953): Estimating heritability in tall fecue (Festuca arundinaceae) from replicated clonal material. Agron. J. 45: 478-481.
FOSTER, G. S. and D. V. SHAW (1988): Using clonal replicates to explore genetic variation in a perennial plant species. Theor. Appl. Genet. 76: 788-794.10.1007/BF0030352724232359
KUMAR, A., P. H. CHAWHAAN and A. K. MATHAROO (2003): Improvement through selection of plus trees in Gmelina arborea. Journal of Tropical Forest Science 15 (3): 441-449.
ZOBEL, B. J. (1981): Vegetative propagation in forest management operations. In: Proc., 16th South For. Tree Improv. Meet., Blacksburg, Virginia. pp. 149-159.