TY CONF TI The Origin of Cups on the Lagoon Coasts of the Curonian and Vistula Spits KW underwater slope KW beach KW edge waves KW wave activity KW surge currents JO XXVII International Shore Conference (Arctic Coast: The Path to Sustainability) AU Badyukova, E.N. AU Zhindarev, L.A. AU Luk'yanova, S.A. AU Solov'eva, G.D. PY 2024 PB Academus Publishing