Show 20 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: parent exact "Electronic journal of Polish agricultural universities" Add to list Journal Article A2 Determination of influence of vegetation on the friction factors in the Biebrza river. D SWIATEK, Ronny Verhoeven (UGent) , J CHORMANSKI, T OKRUSZKO, S IGNAR and Robert Banasiak (UGent) (2008) Electronic journal of Polish agricultural universities. 11(1). p.1-18