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"The hardness of intervalizing four colored caterpillars."
Carme Àlvarez, Josep Díaz, Maria J. Serna (2001)
- Carme Àlvarez, Josep Díaz
, Maria J. Serna
:
The hardness of intervalizing four colored caterpillars. Discret. Math. 235(1-3): 19-27 (2001)

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