- Gräf, C., Kahner, L., Schumann, S., Steglich, W. (2002). "Calopins and
cyclocalopins –
Bitter principles from
Boletus calopus and
related mushrooms". European...
- Gräf, C.; Kahner, L.; Schumann, S.; Steglich, W. (2002). "Calopins and
cyclocalopins –
Bitter principles from
Boletus calopus and
related mushrooms". European...