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Bulletin of the Iranian Mathematical Society > 2018 > 44 > 3 > 837-856
Discrete Mathematics > 2008 > 308 > 24 > 5928-5936
Electronic Notes in Discrete Mathematics > 2005 > 22 > Complete > 305-309
Bulletin of the Iranian Mathematical Society > 2018 > 44 > 3 > 837-856
Discrete Mathematics > 2008 > 308 > 24 > 5928-5936
Electronic Notes in Discrete Mathematics > 2005 > 22 > Complete > 305-309