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"The L(2, 1)-labeling and operations of graphs."
Zhendong Shao, Roger K. Yeh (2005)
- Zhendong Shao, Roger K. Yeh:
The L(2, 1)-labeling and operations of graphs. IEEE Trans. Circuits Syst. I Regul. Pap. 52-I(3): 668-671 (2005)

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