Akbar Davoodi and Behnaz Omoomi, On the 1-2-3-conjecture, Discrete Mathematics and Theoretical Computer Sciences.17(1): 67-78, 2015.
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Akbar Davoodi and Behnaz Omoomi, On the 1-2-3-conjecture, Discrete Mathematics and Theoretical Computer Sciences.17(1): 67-78, 2015.