4Jeffrey Travers &Stanley Milgram.An Experimental Study of the Small World Problem.Sociometry, Vol.32, No4 (Dec, 1969).
5Erica Klarreicla. Smatl World after ALL.Science News, Vo1.164, No.7 (Aug. 16, 2OO3).
6Beth T, Borcherding M, Klein B. Valuation of trust in open network. Proceedings of the European Symposium on Research in Security [J]. Brighton:Springer-Ver-lag, 20044.3-8.
7Johannes G1 u ckler, Thomas Armbr u ster. Bridging Un-certainty in Management Consulting: The Mechanisms of Trust and Networked Reputation[J]. Organization Studies, 2003,24 : 269-297.