1. Alvrez, I. F., Rowney, O. L. and Cobb, F. W. 1979. Mycorrhiza and growth of white-fur seedlings in mineral soil with or without organic layers in a California forest. Canadian Journal of Forest Research, 9: 311–315.
2. Antibus, R K., Kroehler, C. J. and Linkins, A. E. 1986. The effects of external pH, temperature and substrate concentration on acid phosphatase activity of ectomycorrhizal fungi. Canadian Journal of Botany, 64: 2383–2387.
3. Berry, C. R. and Marx, D. H. 1978. Effects of Pisolithus tinctorius ectomycorrhizae on growth of lobolly and virginia pines in the Tennesse copper basin. USDA Forest Service Research Note SE-264.
4. Bettina, B., Jentschke, G. and Godbold, D. L. 1998. The influence of the extrametrical mycelium on growth and nutrition of mycorhizal Norway spruce (Picea abies). In, “Second international Conference on mycorrhiza” (eds. Jonarch, U. A., Danell, E., Fransson, P., Karen, O., Lindahl, B., Rangel, I., and Finlay, R), July 5010, SLU, Uppsala, Sweden, pp. 32.
5. Bettiol, W, Auer, C. G., Krugner, T. L. and Prezotto, M. E. M. 1986. Influence of sewage sludge and Pinus needle on ectomycorrhizal formation in Pinus caribaea var. hodurensis seedlings by the fungi: Pisolithus tinctorius and Thelephora terresteris, Institute of Pesquigey. E. Estudos Florestats, 34: 41–46.