Chircu, Alina M.; Robert J. Kauffman (1999). «Strategies for Internet Middlemen in the Intermediation/Disintermediation/Reintermediation Cycle». Electronic Markets. 9 (1–2): 109–117. CiteSeerX10.1.1.102.6089. doi:10.1080/101967899359337.
Chircu, Alina M.; Robert J. Kauffman (1999). «Strategies for Internet Middlemen in the Intermediation/Disintermediation/Reintermediation Cycle». Electronic Markets. 9 (1–2): 109–117. CiteSeerX10.1.1.102.6089. doi:10.1080/101967899359337.