@Article{PostGildea-ls13,
  author = {Matt Post and Daniel Gildea},
  title = {Bayesian Tree Substitution Grammars as a Usage-based Approach},
  journal = {Language and Speech},
  year = {2013},
  volume = {56},
  number = {3},
  pages = {291--308},
  URL = {http://las.sagepub.com/content/56/3/291.full.pdf+html}
}