@article{460068,
      author = {Li, Ping, and Shirai, Yasuhiro,},
      url = {http://library.usi.edu/record/460068},
      title = {The acquisition of lexical and grammatical aspect  [electronic resource] /},
      publisher = {Mouton de Gruyter,},
      recid = {460068},
      pages = {261 p. :},
      address = {Berlin ;},
      year = {2000},
}