Lowe, Alexander; et al. (2015). "Sedentary urchins influence benthic community composition below the macroalgal zone". Marine Ecology. 36 (2): 129–140. doi:10.1111/maec.12124.
Estes and Duggins (1995). "Sea otters and kelp forests in Alaska: generality and variation in a community ecological paradigm". Ecological Monographs. 65 (1): 75–100. doi:10.2307/2937159. JSTOR2937159.
Harrold and Reed (1985). "Food availability, sea urchin grazing, and kelp forest community structure". Ecology. 66 (4): 1160–1169. doi:10.2307/1939168. JSTOR1939168.
Estes and Duggins (1995). "Sea otters and kelp forests in Alaska: generality and variation in a community ecological paradigm". Ecological Monographs. 65 (1): 75–100. doi:10.2307/2937159. JSTOR2937159.