Gall, J.-C. & Grauvogel-Stamm, L. (2005)
The early Middle Triassic 'Grès à Voltzia' Formation of eastern France: a model of environmental refugium. Comptes Rendus Palevol, 4(6–7), 637–652
DOI: 10.1016/j.crpv.2005.04.007

Gall, J.-C. & Grauvogel-Stamm, L. (1993)
Paleoecology of terrestrial ecosystems from the Buntsandstein (Lower Triasic) of Eastern France. New Mexico Museum of Natural History and Science, Bulletin, 3, 141–145