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:Cell–cell contacts are formed at the adherens junctions (AJs) by intercellular Ca-dependent E-cadherin homodimer formation (Vleminckx and Kemler 1999; Miyoshi and Takai 2005).
Category: