TY JOUR TI Comparison of methane distribution in bottom sediments of shallow lagoons of the Baltic and Black Seas KW Methane diffusive flux KW methane solubility KW grain size KW Vistula Lagoon KW Sevastopol Bay KW Baltic Sea KW Black Sea JO Russian Journal of Earth Sciences AU Ulyanova, M.. AU Malakhova, T.. AU Evtushenko, D.. AU Artemov, Y.. AU Egorov, V.. PY 2021 IS 21 PB Geophysical Center of the Russian Academy of Sciences