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"On 3-pushdown graphs with large separators."
Zvi Galil, Ravi Kannan, Endre Szemerédi (1989)
- Zvi Galil, Ravi Kannan, Endre Szemerédi:
On 3-pushdown graphs with large separators. Comb. 9(1): 9-19 (1989)
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