“…Several excellent reviews have summarized the library and information science literature related to citing (Smith, 1981;Cronin, 1984;White & Mc-Cain, 1989;Borgman, 1990;Liu, 1993). Because this study is interested in the reasons why researchers choose to cite or not cite documents used during their research, the studies especially relevant to this article focus on developing typologies of motivations for citing (Bonzi & Snyder, 1991;Brooks, 1985Brooks, , 1986Cano, 1989;Chubin & Moitra, 1975;Frost, 1979;Hodges, 1978;Hooten, 1991;Moravcsik & Murugesan, 1978;Spiegel-Rosing, 1977;Peritz, 1983;Vinkler, 1987;Snyder & Bonzi, 1989). Also relevant are the few studies that have looked at citing behavior related to negative decisions (MacRoberts & MacRoberts, 1988;Vinkler, 1987).…”