BARTÁK, Miloš,
Peter VÁCZI,
Josef HÁJEK and Jerzy SMYKLA. Low-temperature limitation of primary photosynthetic processes in Antarctic lichens Umbilicaria antarctica and Xanthoria elegans.
Polar Biology. Berlin / Heidelberg: Springer, 2007, vol. 31, No 1, p. 47-51. ISSN 0722-4060.