The Systemic-Structural Theory of Activity: Applications to the Study of Human Work  
Authors: Gregory Z. Bedny ;Steven Robert Harris
DOI: 10.1207/s15327884mca1202_4
Publication Frequency: 4 issues per year
Published in: Mind, Culture, and Activity, Volume 12, Issue 2 May 2005 , pages 128 - 147
http://www.informaworld.com/smpp/content~content=a785308593&db=all

非常感谢！