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52H25 

• Naimpally, S. A.; Singh, K. L.; Whitfield, J. H. M.: Common fixed points for nonexpansive and asymptotically nonexpansive mappings. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 24 (1983), issue 2, pp. 287-300
• Rhoades, Billy E.; Singh, K. L.; Whitfield, J. H. M.: Fixed points for generalized nonexpansive mappings. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 23 (1982), issue 3, pp. 443-451