S.  Imhof, Feller, B., and Heser, A., ?Morpho-anatomical differences among mycoheterotrophic Afrothismia spp. (Thismiaceae) indicate an evolutionary progression towards improved mycorrhizal benefit?, Mycorrhiza, vol. 30(2), pp. 397-405, 2020.

S.  Imhof, Massicotte, H. B., Melville, L. H., and Peterson, R. L., ?Subterranean Morphology and Mycorrhizal Structures?, in Mycoheterotrophy - The Biology of Plants living on Fungi, Heidelberg: Springer, 2013, pp. 157-214.

S.  Imhof, ?Are monocots particularly suited to develop mycoheterotrophy??, in Diversity, Phylogeny and Evolution in the Monocotyledons, O.  Seberg, Petersen, G., Barfod, A., and Davis, J. I., Eds. Kopenhagen: Aarhus University Press, 2010, pp. 11 - 23.

S.  Imhof, Weber, H. C., and Gómez, L. D., ?Ein Beitrag zur Biologie von Voyria tenella Hook. und Voyria truncata (Standley) Standley & Steyermark (Gentianaceae)?, Beitr. Biol. Pflanzen, vol. 68, pp. 113 - 123, 1994.

S.  Imhof, ?Root anatomy and mycotrophy of the achlorophyllous Voyria tenella Hooker (Gentianaceae)?, Bot. Acta, vol. 110, pp. 298 - 305, 1997.

S.  Imhof, ?A dorsiventral root: unusual structures of the subterraneous system of Sciaphila polygyna (Triuridaceae)?, in 16th International Symposium 'Biodiversity and Evolutionary Biologogy' of the DBG - 21-27 September 2003, C.  Bayer, Dressler, S., Schneider, J., and Zizka, G., Eds. Frankfurt: Palmengarten, 2003, p.  - 48.

S.  Imhof and Sainge, M. N., ?Ontogeny of the mycoheterotrophic species Afrothismia hydra (Burmanniaceae)?, Bot. J. Linn. Soc., vol. 157, pp. 31 - 36, 2008.

S.  Imhof, ?Specialized mycorrhizal colonization pattern in achlorophyllous Epirixanthes spp. (Polygalaceae)?, Plant Biol., vol. 9, pp. 786 - 792, 2007.

S.  Imhof, ?Two distinct fungi colonize roots and rhizomes of the myco-heterotrophic Afrothismia gesnerioides (Burmanniaceae)?, Can. J. Bot., vol. 84, pp. 852 - 861, 2006.

S.  Imhof, ?An amazing mycorrhizal complexity in Afrothismia gesnerioides (Burmanniaceae) but still not complex enough for evolution?, in 17th International Symposium Biodiversity and Evolutionary Biology, Bonn, Sept. 24 - 28, T.  Borsch, Ed. 2006, p.  - 154.

S.  Imhof, ?Subterranean structures and mycorrhiza of the achlorophyllous Burmannia tenella Benth. (Burmanniaceae)?, Can. J. Bot., vol. 77, pp. 637 - 643, 1999.

S.  Imhof, ?Root morphology, anatomy and mycotrophy of the achlorophyllous Voyria aphylla (Jacq.) Pers. (Gentianaceae)?, Mycorrhiza, vol. 9, pp. 33 - 39, 1999.

S.  Imhof and Weber, H. C., ?Root structures and mycorrhiza of the achlorophyllous Voyria obconica Progel (Gentianaceae)?, Symbiosis, vol. 29, pp. 201 - 211, 2000.

S.  Imhof, ?Subterranean structures and mycotrophy of the achlorophyllous Dictyostega orobanchoides (Hook.) Miers (Burmanniaceae)?, Rev. Biol. Trop., vol. 49, pp. 239 - 247, 2001.

S.  Imhof, ?A dorsiventral mycorrhizal root in the achlorophyllous Sciaphila polygyna (Triuridaceae)?, Mycorrhiza, vol. 13, pp. 327 - 332, 2003.

S.  Imhof and Weber, H. C., ?Root anatomy and mycotrophy (AM) of the achlorophyllous Voyria truncata (Standley) Standley & Steyermark (Gentianaceae)?, Bot. Acta, vol. 110, pp. 127 - 134, 1997.

S.  Imhof, ?Subterranean structures and mycotrophy of the achlorophyllous Triuris hyalina Miers (Triuridaceae)?, Can. J. Bot., vol. 76, pp. 2011 - 2019, 1998.

S.  Imhof, ?Anatomy and mycotrophy of the achlorophyllous Afrothismia winkleri (Engl.) Schltr. (Burmanniaceae)?, New Phytol., vol. 144, pp. 533 - 540, 1999.

S.  Imhof, ?Morphology and development of the subterranean organs of the achlorophyllous Sciaphila polygyna (Triuridaceae)?, Bot. J. Linn. Soc., vol. 146, pp. 295 - 301, 2004.

S.  Imhof, ?Largely unknown: the underground parts of achlorophyllous mycotrophic plants?, in 15. Internationales Symposium Biodiversität und Evolutionsbiologie, Bochum 23.09.-28.09., T.  Stützel, Ed. Bochum: Ruhr-Universität, 2001, p.  - 5.

S.  Imhof, ?Morphologie, Anatomie und Mycorrhiza ausgewählter myco-heterotropher Pflanzen?, Dissertation, 2000.

S.  Imhof, ?Strategies for sustainable use of mycorrhiza in myco-heterotrophic plants?, in Programme and abstracts, Second International Conference on Mycorrhiza, July 5-10 1998, Uppsala, Sweden, U.  Ahonen-Jonnarth, Danell, E., Fransson, P., Karen, O., Lindahl, B., Rangel, I., and Finlay, R., Eds. Uppsala: Swedish University of Agricultural Science, 1998, p. 86.

H. C.  Weber, Imhof, S., and Kendzior, B., Evolution of the arbuscular mycorrhiza (AM) in the Gentianales. Woods Hole, MA: Marine Biological Laboratory, 1997, p. 89.

H. C.  Weber, Imhof, S., and Kendzior, B., Voyria tenella Hook. (Gentianaceae): Endglied einer bemerkenswerten Progressionsreihe mycotropher Lebensweisen. Bayreuth: , 1994, p. 229.

S.  Imhof, ?Zur Biologie von Voyria truncata (Standley) Standley & Steyermark und Voyria tenella Hooker?, Diplomarbeit, Marburg., 1994.