Nienartowicz, Andrzej, Dariusz Kamiński, Mieczysław Kunz, Miłosz Deptuła, and Edyta Adamska. 2015. “Changes in the Plant Cover of the Dune Hill in Folusz Near Szubin (NW Poland) Between 1959 and 2012: The Problem of Preservation of Xerothermic Grasslands in the Agricultural Landscape”. Ecological Questions 20 (March):23-38. https://doi.org/10.12775/EQ.2014.013.