Show 15 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: keyword exact "umbrella test" Add to list Journal Article A1 Using orthogonal trend contrasts for testing ranked data with ordered alternatives Olivier Thas (UGent) , D John Best and John CW Rayner (2012) STATISTICA NEERLANDICA. 66(4). p.452-471