Mendyk, Łukasz, Markiewicz, M., Świtoniak, M. and Bednarek, R. (2013) “The use of orthophoto map for soils mapping of dwindling lakes catchment areas: a case study of Sumowskie Lake, NE Poland”, Ecological Questions, 17, pp. 57 –. doi: 10.12775/ecoq-2013-0016.