Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:…b, Benba et al. 2015; Bocklet et al. 2011; Hariharan et al. 2014; Bakar et al. 2012; Mekyska et al. 2015a; Musa et al. 2015; Naranjo et al. 2016; Orozco-Arroyave et al. 2013a, b, 2014a, b; Rusz et al. 2011, 2013b; Sakar and Kursun 2009; Sakar et al. 2013; Shahbakhti et al. 2013a, b; Shirvan…
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