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"On the (di)graphs with (directed) proper connection number two."
Guillaume Ducoffe, Ruxandra Marinescu-Ghemeci, Alexandru Popa (2017)
- Guillaume Ducoffe, Ruxandra Marinescu-Ghemeci, Alexandru Popa:
On the (di)graphs with (directed) proper connection number two. Electron. Notes Discret. Math. 62: 237-242 (2017)
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