E. H.  Stukenbrock and Rosendahl, S., ?Distribution of dominant arbuscular mycorrhizal fungi among five plant species in undisturbed vegetation of a coastal grassland?, Mycorrhiza, vol. 15, pp. 497?503, 2005.

Z.  Sýkorová, Ineichen, K., Wiemken, A., and Redecker, D., ?The cultivation bias: different communities of arbuscular mycorrhizal fungi detected in roots from the field, from bait plants transplanted to the field, and from a greenhouse trap experiment?, Mycorrhiza, vol. 18, pp. 1?14, 2007.

L.  Whitfield, Richards, A. J., and Rimmer, D. L., ?Relationships between soil heavy metal concentration and mycorrhizal colonisation in Thymus polytrichus in northern England?, Mycorrhiza, vol. 14, pp. 55?62, 2004.