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        Journal: Symmetry, 2019
        Volume: 11 
                	Number: 553 
                
        
        Article:
        Involution Abel–Grassmann’s Groups and Filter Theory of Abel–Grassmann’s Groups 
        Authors: 
       	by
                    Xiaohong Zhang and Xiaoying Wu        
        Link:
        https://www.mdpi.com/2073-8994/11/4/553
        
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