1. Aas, G., Kircher, F., Maier, J, 1993. Untersuchungen zur geographischen Variation morphologischer Merkmale von Abies alba Mill. In: Wolf, H. (Ed.), (Hrsg.) Weißtannenherkünfte – Neue Resultate zur Provenienzforschung, Ecomed, Landsberg, pp. 11–31.
2. Geographic variation in leaf essential oils and RAPDs of Juniperus polycarpos K. Koch in Central Asia;Adams;Biochem. Syst. Ecol.,2001
3. Aleksandrovsky, E.S, Abdurazakova, U.T. 1996. Nauchnye osnovy lesomelioratsii v Uzbekistane. (Scientific bases of forest amelioration in Uzbekistan). In: Kayimov, A.K. (Ed.), UZNIILH, Tashkent 1996, pp. 131–189
4. Needle anatomy changes with increasing tree age in Douglas-fir;Apple;Tree Physiol.,2002
5. Morphological and genetic variation within the widespread species Acacia victoriae (Mimosaceae);Ariati;Aust. Syst. Bot.,2007