JACOBI Robert WASOWSKI, Janusz, 1985, Geochemistry and plate tectonic significance of the volcanic rocks of the Summerford Group, north-central Newfoundland, Geology (Boulder Colo.) 13 (1985): 126–130.,
URL: http://www.cnr.it/prodotto/i/243921

Data from https://intranet.cnr.it/people/