] . 1999. Carbon balance of a winter wheat-root microbiota system under elevated CO2. Photosynthetica 36: 341–354.
. 1997. Rhizosphere microflora of winter wheat plants cultivated under elevated CO2. Plant and Soil 197: 251-259.
. 1994. The Effect of Elevated Co2 Concentration On Photosynthetic Co2 Fixation, Respiration and Carbon Economy of Wheat Plants. Rostlinna vyroba 40: 689–696.