7HOUGHTON R , BABER C, MCMASTER R, et al. Command and Control in Emergency Services Operations: A Social Network Analysis[J]. Ergonomics, 2006, 49( 12-13): 1204.
8GRANOVETI'ER S. The Strength of Weak Ties [J]. American Journal of Sociology, 1973, 78(6): 1360-1380.
9POWELL W W, KOPUT K W, SMITH-DOERR L Inter- organizational Collaboration and the Locus of Innovation: Networks of Learning inBiotechnology [J]. Administrative Science Quarterly, 1996, 41( 1 ) : 116--145.
10KRAATZ S. Learning by Association? lnterorganizational Networks and Adaptation to Environmental Change [J]. The Academy of Management Journal, 1998, 41 (6) : 621-643.