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"Proper orientation number of triangle-free bridgeless outerplanar graphs."
Jiangdong Ai et al. (2020)
- Jiangdong Ai, Stefanie Gerke, Gregory Z. Gutin, Yongtang Shi, Zhenyu Taoqiu:
Proper orientation number of triangle-free bridgeless outerplanar graphs. J. Graph Theory 95(2): 256-266 (2020)
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