@inproceedings{levy2004dependency,
 author = {Roger Levy and Christopher D. Manning},
 booktitle = {Association for Computational Linguistics (ACL)},
 title = {Deep dependencies from context-free statistical parsers: correcting the surface dependency approximation},
 url = {https://nlp.stanford.edu/pubs/levy2004dependency.pdf},
 year = {2004}
}