Maček, Irena, Damijana Kastelec, and Dominik Vodnik. 2012. “Root Colonization With Arbuscular Mycorrhizal Fungi and Glomalin-Related Soil Protein (GRSP) Concentration in Hypoxic Soils in Natural CO2 Springs”. Agricultural and Food Science 21 (1):62-71. https://doi.org/10.23986/afsci.5006.