L. Branisa

Silurian of Bolivia

W. Berry, A. Boucot, Guy A. Chamot, 1972 .

Calmoniid trilobites of the Lower Devonian Scaphiocoelia zone of Bolivia, with remarks on related species. Bulletin of the AMNH ; v. 165, article 2

N. Eldredge, L. Branisa, 1980 .

Two new Ordovician graptolites from Bolivia

S. Finney, L. Branisa, 1984, Geological Magazine.