Túri, N., J. Rakonczai, and C. Bozán. “Condition Assessment of Subsurface Drained Areas and Investigation of Their Operational Efficiency by Field Inspection and Remote Sensing Methods”. Journal of Environmental Geography, vol. 14, no. 3-4, Nov. 2021, pp. 14-25, doi:10.2478/jengeo-2021-0008.