https://scholar.google.co.th/citations?view_op=view_citation&hl=th&user=SuZ8LtQAAAAJ&citation_for_view=SuZ8LtQAAAAJ:u5HHmVD_uO8C
https://scholar.google.co.th/citations?view_op=view_citation&hl=th&user=SuZ8LtQAAAAJ&citation_for_view=SuZ8LtQAAAAJ:u5HHmVD_uO8C