Ruiz, Gregory M. and Hewitt, Chad. 2009. "Latitudinal Patterns of Biological Invasions in Marine Ecosystems: A Polar Perspective." in Smithsonian at the Poles: Contributions to International Polar Year Science, edited by Krupnik, Igor, Lang, Michael A., and Miller, Scott E., 347–358. IPY. https://doi.org/10.5479/si.097884601X.26