“…This technique is now a well established approach to mapping the bibliometric structure of academic disciplines (Bayer, Smart, & McLaughlan, 1990;Bradley, Willett, & Wood, 1992;Cronin & Davenport, 1989;Culnan, O'Reilly, & Chatham, 1990;Lievrouw, 1988;Martyn, 1975;McCain, 1990;Oppenheim, 1995Oppenheim, , 1997Paisley, 1990;Small & Garfield, 1985;White & McCain, 1998).…”