- 2002 -

Gielen B., Calfapietra C., Claus A., Sabatti M. & Ceulemans R., 2002. Crown architecture of Populus spp. is differentially modified by free-air CO₂ enrichment (POPFACE). New Phytologist 153: 91-99.

- 2001 -

Calfapietra C., Gielen B., Sabatti M., De Angelis P., Scarascia Mugnozza G. & Ceulemans R., 2001. Growth performance of Populus exposed to “Free Air Carbon dioxide Enrichment” during the first growing season in the POPFACE experiment. Annals of Forest Science 58: 819-828.

Ferris R., Sabatti M., Miglietta F., Millis R.F. & Taylor G., 2001. Leaf area is stimulated in Populus by free air CO₂ enrichment (POPFACE), through increased cell expansion and production. Plant, Cell and Environment 24: 305-315.

Gielen B. and Ceulemans R., 2001. The likely impact of rising atmospheric CO₂ on natural and managed Populus: a literature review. Environmental Pollution 115: 335-358.

Gielen B., Calfapietra C., Janssens I.A., Scarascia-Mugnozza G. & Ceulemans R., 2001. Effects of atmospheric CO₂ on growth and branchiness of different poplar (Populus) genotypes in the POPFACE experiment. In: S. Huttunen, H. Heikkila, J. Bucher, B. Sundberg, P. Jarvis & R. Matyssek (eds.) Trends in European Forest Tree Physiology Research. Kluwer Academic Publishers, The Netherlands, pp. 183-196.

Gielen B., Calfapietra C., Sabatti M. & Ceulemans R., 2001. Leaf area dynamics in a closed poplar plantation under free-air carbon dioxide enrichment. Tree Physiology 21: 1245-1255.

Karnosky D.F., Gielen B., Ceulemans R., Schlesinger W.H., Norby R.J., Oksanen E., Matyssek R. & Hendrey, G.R., 2001. FACE systems for studying the impacts of greenhouse gases on forest ecosystems. In: D.F. Karnosky, R. Ceulemans, G. Scarascia Mugnozza, & J. Innes (eds.) The Impact of Carbon Dioxide and Other Greenhouse Gases on Forest Ecosystems. CABI Publishing, Wallingford, UK, pp. 297-324.

Lukac M., Calfapietra C. & Godbold D.L., 2001. Root production and turnover in Populus grown under elevated CO₂ using a free air enrichment system POPFACE. In: W.J. Horst et al. (eds.) Plant nutrition – food security and sustainability of agro-ecosystems. Kluwer Academic Publishers, The Netherlands, pp. 688-689.

Miglietta F., Peressotti A., Vaccari F.P., Zaldei A., De Angelis P. & Scarascia Mugnozza G., 2001. Free-air CO₂ enrichment (FACE) of a poplar plantation: the POPFACE fumigation system. New Phytologist 150: 465-476.

Taylor G, Ceulemans R, Ferris R, Gardner S.D.L. & Shao B.Y., 2001. Increased leaf area expansion of hybrid poplar in elevated CO₂. From controlled environment to open-top chambers and to FACE. Environmental Pollution 115: 463-472.

- 2000 -

Gielen B., Scarascia-Mugnozza G. & Ceulemans R., 2000. Effects of atmospheric carbon enrichment on a cultivated terrestrial ecosystem: a FACE experiment on a short rotation intensive poplar plantation (POPFACE) In: R. Ceulemans, J. Bogaert G. Deckmyn & I. Nijs (eds.) Topics in Ecology: Structure and Function in Plants and Ecosystems, University of Antwerp, UIA, Wilrijk BE, pp. 199-209.