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"Obstruction Sets for Outer-Projective-Planar Graphs."
Dan Archdeacon et al. (1998)
- Dan Archdeacon, Nora Hartsfield, C. H. C. Little, Bojan Mohar:
Obstruction Sets for Outer-Projective-Planar Graphs. Ars Comb. 49 (1998)
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