Kroger, B., Landing, E., 2010. Early Ordovician Community Evolution with Eustatic Change Through the Middle Beekmantown Group, Northeast Laurentia. Palaeogeography, Palaeoclimatology, Palaeoecology 294, 174-188. doi:10.1016/j.palaeo.2009.11.025

Kroger, B., Landing, E., 2009. Cephalopods and Paleoenvironments of the Fort Cassin Formation (upper Lower Ordovician), Eastern New York and Adjacent Vermont. Journal of Paleontology 83, 664-693. doi:10.1666/08-181.1

Kroger, B., Landing, E., 2008. Onset of the Ordovician Cephalopod Radiation-evidence from the Rochdale Formation (middle Early Ordovician, Stairsian) in Eastern New York. Geological Magazine 145, 490-520. doi:10.1017/S0016756808004585

Kroger, B., Landing, E., 2007. The Earliest Ordovician Cephalopods of Eastern Laurentia--Ellesmerocerids of the Tribes Hill Formation, Eastern New York. Journal of Paleontology 81, 841-857.