@Article{cohen-gildea-cl16,
  author = {Shay B. Cohen and Daniel Gildea},
  title = {Parsing Linear-Context Free Rewriting Systems with Fast Matrix
  Multiplication},
  journal = {Computational Linguistics},
  year = {2016},
  volume = {42},
  number = {3},
  pages = {421-455},
  URL = {http://www.mitpressjournals.org/doi/abs/10.1162/COLI_a_00254}
}