Wetzel, A.; Uchman, A. (1997). Ichnology of deep-sea fan overbank deposits of the Ganei slates (Eocene, Switzerland)— a classical flysch trace fossil locality studied first by Oswald Heer. Ichnos. 5(2): 139-162.
Ichnology of deep-sea fan overbank deposits of the Ganei slates (Eocene, Switzerland)— a classical flysch trace fossil locality studied first by Oswald Heer