Bisby, F. A., Vaughan, J. G. and Wrigh, C. A. 1980: Chemosystematics: Principles and Practice. -London and New York.
Browicz, K. 1982: Chorology of trees and shrubs in South-West Asia and adjacent regions. - Warszawa.
Gansel, C. R. and A. E. Squillace 1976: Geographic variation of monoterpenes in cortical oleoresin of Slash Pine. -Silvae Genet. 25: 5-6.
Harborne, J. B. 1984: Chemical Data in Practical Taxonomy in V. H. Heywood and D. M. Moore (eds.), the Current Concepts in Plant Taxonomy, pp. 237-261. - London and New York.
Hefendehl, F. W. 1962: Planta Med. 10 :241-266.
Hunt, R. S. and von Rudloff, E. 1977: Leaf-oil-terpene variation in Western White Pine populations of the Pacific Northwest, Forest Science, vo1.23 (4), pp. 507-516.
Kaiser. H. and Lang W. 1951: Deut. Apoth. Ztg. 91 :163-169.
Kubitzki, K. 1984: Phytochemistry in Plant Systematics and Evolution, in V. H. Heywood and D. M. Moore (eds.). pp. 263-277.- London and New York.
Rudloff, E. von 1969: Scope and limitations of Gas Chromatography of terpenes in chemosystematic studies, in M. K. Seikel and V. C. Runekles (eds.), Recent Advances in Phytochemistry, vol. 2, pp. 127-159.- New York.
Stace, C. A. 1980: Plant Taxonomy and Biosystematics - London.
Squillace, A. E. 1976: Analyses of Monotepenes of Conifers by Gas-Liquid Chromatography, in J. P. Miksche (ed.) Modern Methods in Forest Genetics, pp. 120-157.- Berlin and New York.
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