starodávná pěstírna škeblí na ostrově Quadra v Britské Kolumbii, Groesbeck AS, Rowell K, Lepofsky D, Salomon AK (2014) Ancient Clam Gardens Increased Shellfish Production: Adaptive Strategies from the Past Can Inform Food Security Today. PLoS ONE 9(3): e91235. doi:10.1371/journal.pone.0091235