@InProceedings{Erk_Koller:2001,
      AUTHOR = {Erk, Katrin and Koller, Alexander},
      TITLE = {VP Ellipsis by Tree Surgery},
      YEAR = {2001},
      BOOKTITLE = {Proceedings of the 13th Amsterdam Colloquium, December 17-19},
      ADDRESS = {Amsterdam},
      URL = {https://www.coli.uni-saarland.de/~koller/papers/jigsaw.ps.gz},
      ABSTRACT = {We present jigsaw parallelism constraints, a flexible formal tool for replacing parts of trees with other trees. Jigsaw constraints extend the Constraint Language for Lambda Structures, a language used in underspecified semantics to declaratively describe scope, ellipsis, and their interaction, and can be used to improve the coverage of ellipses represented by CLLS.},
      ANNOTE = {COLIURL : Erk:2001:VET.pdf Erk:2001:VET.ps}
}