73 There is an unambiguous relationship between X and Y (Rao, 1998). X is one of the most intense reactions following CHD (Lane, 2003). X has been found to oppose the anti-inflammatory actions of Y on Z (Alourfi, 2004). A relationship exists between an individual’s working memory and their ability to …. (Jones, 2002). GM varieties of maize are able to cross-pollinate with non-GM varieties (Smith, 1998; Jones, 1999). Reference to single investigations or publications in the past: time frame prominent In 1975, Smith et al. published a paper in which they described …. In 1990, Patel et al. demonstrated that replacement of H2O with heavy water led to …. Thirty years later, Smith (1974) reported three cases of X which …. In the 1950s, Gunnar Myrdal pointed to some of the ways in which …. (Myrdal, 1957) In 1981, Smith and co-workers demonstrated that X induced in vitro resistance to …. In 1990, Al-Masry et al. reported a new and convenient synthetic procedure to obtain ….
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