Kovacs K. M., Citta J., Brown T., Dietz R., Ferguson S., Harwood L., Houde M., Lea E. V., Quakenbush L., Riget F., Rosing-Asvid A., Smith T., Svetochev V., Svetocheva O. and Lydersen C. (2021) “Variation in body size of ringed seals (<em>Pusa hispida hispida</em&gt;) across the circumpolar Arctic: evidence of morphs, ecotypes or simply extreme plasticity?”, Polar Research, 40. doi: 10.33265/polar.v40.5753.