1. Chalupa, V.: Induction of organogenesis in forest tree tissue cultures. - Commun. Inst. forest. Čechosl.9: 39–50, 1975.
2. Chalupa, V.:In vitro propagation of some broad-leaved forest trees. - Commun. Inst. forest. Čechosl.11: 159–170, 1979.
3. Durzan, D. J., Campbell, R. A.: Prospects for the mass production of improved stock of forest trees by cell and tissue culture. - Can. J. Forest Res.4: 151–174, 1974.
4. Huhtinen, O., Yahyaoglu, Z.: Das frühe Blühen von aus Kalluskulturen herangezogenen Pflänzchen bei der Birke (Betula pendula Roth.). - Silvae Genet.23: 32–34, 1974.
5. Murashige, T., Skoog, F.: Organic growth factor requirements of tobacco tissue cultures. - Physiol. Plant,15: 473–497. 1962.