Korkonen, Sanna T., Antti E.K. Ojala, Emilia Kosonen, and Jan Weckström. “Seasonality of Chrysophyte Cyst and Diatom Assemblages in Varved Lake Nautajärvi – Implications for Palaeolimnological Studies”. Journal of Limnology 76, no. 2 (February 13, 2017). Accessed June 24, 2021. https://jlimnol.it/index.php/jlimnol/article/view/jlimnol.2017.1473.