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:…and seedling growth under low temperatures (qLTG3-1, LTG1), tolerance of low temperatures at the fertilization stage and cold tolerance at the booting stage (Nonoue et al. 2008;Wu et al. 2013; Fujino et al. 2013; Hori et al. 2013; Shinada et al. 2013, 2014; Naranjo et al. 2014; Lu et al. 2014).
Category: