@inproceedings(2003-learning-of-stochastic-context-free-grammars-by-means-of-estimation-algorithms-and-initial-treebank-grammars,
  author = {Diego Linares and Joan-Andreu Sánchez and José Miguel Benedí Ruiz and Francisco Torres Goterris},
  title = {Learning of Stochastic Context-Free Grammars by means of Estimation Algorithms and Initial Treebank Grammars},
  year = {2003},
  booktitle = {Iberian Conference on Pattern Recognition and Image Analysis (IbPRIA)},
  address = {Mallorca, España},
  pages = {403-410}
)