Slack, John F., M.R. Van Baalen, et Douglas N. Reusch. 2020. « Regional Geochemical Variations in a Metamorphosed Black Shale: A Reconnaissance Study of the Silurian Smalls Falls Formation, Maine, USA ». Atlantic Geoscience 56 (octobre):231-55. https://doi.org/10.4138/atlgeol.2020.010.