Engestr╢M Yrj╢ 1948- From Teams To Knots : Activity - Theoretical Studies Of Collaboration And Learning At Work / Yrj╢ Engestr╢M. - Cambridge New York : Cambridge University Press 2008. - XII 261 P. : ILL. 24 CM. - Learning In Doing 0 . ENG ISBN: 9780521865678 (Hbk.)