Referaty pracowników ECOPLAN Ryszard Kowalczyk:

1. Ryszard Kowalczyk, Assessment of Physiographic Conditions for the Needs of Spatial Planning - More Secure Way for Implementation of Balanced Development Idea ,IAIA 2000
2. Ryszard Kowalczyk, Strategic Assessment of the Effect as an Instrument for Identification of the Benefits Resulting from Implementation of the Programs and Local Projects, IAIA 2000
3. Ryszard Kowalczyk, Poland - with New Law in the New Century,  IAIA 2000
4. Jarosław Kowalczyk, Ecophysiographic study for more environmental spatial planning, IAIA 2006, Haga