Kornnika Gree-ut และผู้แต่งคนอื่นๆ. (2006) An automatic text summarization approach using content-based and graph-based characteristics. National Institute of Development Administration:ม.ป.ท.Kornnika Gree-ut และผู้แต่งคนอื่นๆ. 2006. An automatic text summarization approach using content-based and graph-based characteristics. ม.ป.ท.:National Institute of Development Administration;Kornnika Gree-ut และผู้แต่งคนอื่นๆ. An automatic text summarization approach using content-based and graph-based characteristics. ม.ป.ท.:National Institute of Development Administration, 2006. Print.