ŠÁLY, Rudolf - MIDRIAK, Rudolf. Water erosion in Slovakia. In From soil survey to sustainable farming : conference to 35th Anniversary of the Institute Organized within the ENCY activities, October 3-5, 1995, High Tatras, Stará Lesná. Vedecké práce VÚPÚ 19/1. 1995. 1.vyd. - Bratislava : VÚPÚ, 1996. ISBN 80-85361-17-5, s. 169-175.