Wrenn, John H.; Hart, George F. (1988): Paleogene dinoflagellate cyst biostratigraphy of Seymour Island, Antarctica. Geological Society of America (GSA), Boulder, CO, United States, In: Feldmann, Rodney M. (editor), Woodburne, Michael O. (editor), Geology and paleontology of Seymour Island, Antarctic Peninsula, 169, 321-447, georefid:1989-036700