Landing, E., Westrop, S.R., 2015. Late Cambrian (middle Furongian) Shallow-Marine Dysoxic Mudstone with Calcrete and Brachiopod?Olenid?Lotagnostus Faunas in Avalonian Cape Breton Island, Nova Scotia. Geological Magazine 152, 973-992. doi:10.1017/S001675681400079X

Landing, E., Westrop, S.R., Kroger, B., English, A.M., 2011. Left Behind--Delayed Extinction and a Relict Trilobite Fauna in the Cambrian--Ordovician Boundary Succession (East Laurentian Platform, New York). Geological Magazine 148, 529-557. doi:10.1017/S0016756810000919

Landing, E., English, A.M., Keppie, J.D., 2010. Cambrian Origin of All Skeletalized Metazoan Phyla--Discovery of Earth's Oldest Bryozoans (Upper Cambrian, Southern Mexico). Geology 38, 547-550. doi:10.1130/G30870.1