4.2 Geographical and seasonal coverage of sea ice in the Baltic SeaRaudsepp, Urmas; Uiboupin, Rivo; Laanemäe, Kaari; Maljutenko, IljaJournal of operational oceanography2020 / p. S1−S172, 11 p https://doi.org/10.1080/1755876X.2020.1785097