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"The Four-in-a-Tree Problem in Triangle-Free Graphs."
Nicolas Derhy, Christophe Picouleau, Nicolas Trotignon (2009)
- Nicolas Derhy, Christophe Picouleau, Nicolas Trotignon:
The Four-in-a-Tree Problem in Triangle-Free Graphs. Graphs Comb. 25(4): 489-502 (2009)
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