Collaboration in design - justification, characteristics and related conceptsPikas, Ergo; Koskela, Lauri; Treldal, Niels; Ballard, Glenn; Liias, Roode24th Annual Conference of the International Group for Lean Construction : Boston, USA, 20-22 July 20162016 / p. 143-152 : ill http://iglc.net/Papers/Details/1270 Towards shared understanding on common ground, boundary objects and other related conceptsKoskela, Lauri; Pikas, Ergo; Gomes, Danilo24th Annual Conference of the International Group for Lean Construction : Boston, USA, 20-22 July 2016 : proceedings2016 / p. 63-72 http://iglc.net/Papers/Details/1352