Building a Large Annotated Corpus of English: The Penn Treebank. - Mitchell P. Marcus; Beatrice Santorini; Mary Ann Marcinkiewicz (Comput. Linguistics, 1993)

The Penn Treebank: Annotating Predicate Argument Structure. - Mitchell P. Marcus; Grace Kim; Mary Ann Marcinkiewicz; Robert MacIntyre; Ann Bies; Mark Ferguson; Karen Katz; Britta Schasberger (HLT, 1994)