Eriksson, M. O. G., Johansson, I., & Ahlgren, C.-G. (1992). Levels of mercury in eggs of Red-throated Diver Gavia stellata and Black-throated Diver G. arctica in Southwest Sweden. Ornis Svecica, 2(1), 29–36. https://doi.org/10.34080/os.v2.23082