Calculating the Optimal Step in Shift-Reduce Dependency Parsing: From Cubic to Linear Time Mark-Jan Nederhof author 2019 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal nederhof-2019-calculating 10.1162/tacl_a_00268 https://aclanthology.org/Q19-1018/ 2019 7 283 296