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:From results reported here, and those in previous works (recent works of particular importance to this report are: Chapple and Krans 2004; Krans and Chapple 2005), we have adopted the following conclusions: (1) The reflex generation of force is profoundly nonlinear and the first phase may act like…
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