Beszédes, S., Papp-Sziládi, K., Keszthelyi-Szabó, G. and Hodúr, C. 2018. Detection of biodegradation degree of sludge using dielectric measurement. Review on Agriculture and Rural Development. 6, 1-2 (Jul. 2018), 108–112. DOI:https://doi.org/10.14232/rard.2017.1-2.108-112.