Proofreading a previously published article in the Journal of Science.

Following the directive of Vietnam National University, Hanoi, the Vietnam National University, Hanoi Journal of Science (TCKH) will publish all articles previously published in TCKH on the Vietnam National University, Hanoi website in the near future.In the spirit of respecting the law, in order to protect the intellectual property rights and academic reputation of the authors, the Journal of Science proposes that authors who have had articles published in the journal take time to review their work and, if necessary, revise the content and form (writing style, spelling, terminology, Vietnamese and English abstracts, citations, etc.) before January 30, 2013. After this deadline, the Journal of Science will publish the articles and the authors will be fully responsible for their work. All opinions and suggestions should be sent to the Editorial Office: Room 806, Journal of Science, Vietnam National University, Hanoi, 144 Xuan Thuy Street - Cau Giay - Hanoi. Phone: (04) 37547902. Email: tckh@vnu.edu.vn