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"On the number of 4-contractible edges in 4-connected graphs."
Kiyoshi Ando et al. (2009)
- Kiyoshi Ando, Yoshimi Egawa, Ken-ichi Kawarabayashi, Matthias Kriesell:
On the number of 4-contractible edges in 4-connected graphs. J. Comb. Theory B 99(1): 97-109 (2009)
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