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:) For ease of algorithm development and specification, a number of basic communication, data movement, and global operations on the LARPBS model implemented using the coincident pulse processor addressing technique [2, 11, 23] have been developed [13, 18].
Category: