Conference paper (2008) - C. Shen (author), C Shen (author), HTM Pham (author), HTM Pham (author), AT Nguyen (author), PM Sarro (author), Pasqualina Maria Sarro (author), Pasqualina M. Sarro (author), P.M. Sarro (author), Pasqualina M Sarro (author), Lina Sarro (author), P. M. Sarro (author)