Reference
Tjakko Stijve, C. Hischenhuber, D. Ashley (1984): Occurrence of 5-Hydroxylated Indole Derivatives in Panaeolina foenisecii (Fries) Kuehner from Various Origin (Vorkommen von 5-Hydroxy!ierten Indolderivaten in Panaeolina foenisecii (Fries) Kuehner verschiedener Herkunft) – Zeitschrift für Mykologie - Journal of the German Mycological Society – 50_1984: 361 - 368.