Koit, O., Ravbar, N., Marandi, A. and Terasmaa, J. 2017. Treshold-controlled three-stage hydraulic behaviour of a mantled shallow carbonate aquifer (Tuhala karst area, North Estonia). Acta Carsologica. 46, 2-3 (Dec. 2017). DOI:https://doi.org/10.3986/ac.v46i2-3.4951.