D. Cai, J. Hoffman, and M. Helmert, Enhancing the context-enhanced additive heuristic with precedence constraints, Proc. ICAPS'09, 2009.

M. Helmert and C. Domshlak, Landmarks, critical paths and abstractions: What's the difference anyway?, Proc. ICAPS'09, pp.162-169, 2009.

M. Helmert, P. Haslum, and J. Hoffmann, Flexible abstraction heuristics for optimal sequential planning, Proc. ICAPS'07, pp.176-183, 2007.

M. Helmert, A planning heuristic based on causal graph analysis, Proc. ICAPS'04, 2004.

J. Hoffmann and B. Nebel, The FF planning system: Fast plan generation through heuristic search, JAIR, vol.14, pp.253-302, 2001.

J. Hoffmann, Where 'ignoring delete lists' works: Local search topology in planning benchmarks, JAIR, vol.24, pp.685-758, 2005.

F. Hutter, H. Hoos, and T. Stützle, Automatic algorithm configuration based on local search, Proc. AAAI '07, 2007.

A. Joshi and Y. Schabes, Tree-Adjoining Grammars, 1997.
DOI : 10.1007/978-3-642-59126-6_2

E. Karpas and C. Domshlak, Cost-optimal planning with landmarks, Proc. IJCAI'09, 2009.

J. Koehler and J. Hoffmann, On reasonable and forced goal orderings and their use in an agenda-driven planning algorithm, JAIR, vol.12, pp.338-386, 2000.

A. Koller and R. Petrick, Experiences with planning for natural language generation. CI, 2010.

A. Koller and M. Stone, Sentence generation as planning, Proc. of the 45th Annual Meeting of the Association for Computational Linguistics (ACL'07), 2007.

C. R. Perrault, A. , and J. F. , A plan-based analysis of indirect speech acts, American Journal of Computational Linguistics, vol.6, pp.3-4167, 1980.

S. Richter, M. Helmert, and M. Westphal, Landmarks revisited, Proc. AAAI'08, 2008.

M. Steedman and R. P. Petrick, Planning dialog actions, Proceedings of the Eighth SIGdial Workshop on Discourse and Dialogue, pp.265-272, 2007.

G. Xtag-research, A lexicalized tree adjoining grammar for english, 2001.