1. Árendás T and Sarkadi J. 1995. P-hatások és-utóhatások erdőmaradványos csernozjomon. (P effects and after-effects on chernozemic brown forest soil.) Növénytermeiés 44:271–281.
2. Blumenthal C, Rawson HM, McKenzie E, Gras PW, Barlow EWR and Wrigley CW. 1996. Changes in wheat grain quality due to doubling the level of atmospheric CO2. Cereal Chem. 73:762–766.
3. Budyko MI and Izrael YA. 1991. Anthropogenetic Climatic Change. The University of Arizona Press, Tucson. 485 p.
4. Bunce JA and Caulfield F. 1991. Reduced respiratory carbon dioxide efflux during growth at elevated carbon dioxide in three herbaceous perennial species. Ann. Bot. 67:325–330.
5. Csathó P and Árendás T. 1997. The effect of soil organic matter content on crop responses to N given in mineral or organic form. Agrokémia és Talajtan 46:63–76.