Any catastrophic event at the Frasnian-Famennian boundary. (In: Commision Internationale de microflore du Paleozoique (CIMP) Acritarch Subcommision: O.Fatka and T.Servais, editors)
Reference:
Thomalla,E. et al. (1996)
Any catastrophic event at the Frasnian-Famennian boundary. (In: Commision Internationale de microflore du Paleozoique (CIMP) Acritarch Subcommision: O.Fatka and T.Servais, editors) Acta Universitatis Carolinae-Geologica
Vol. 40 # 3 P. 675- 676