Discrete Mathematics
Discrete Mathematics > 2017 > 340 > 5 > 1069-1073
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Discrete Mathematics > 2017 > 340 > 8 > 1986-1995
Discrete Mathematics > 2017 > 340 > 11 > 2714-2722
Discrete Mathematics > 2017 > 340 > 12 > 3032-3043