Character data and reference materials are sourced from dictionaries provided by the Vietnamese Nôm Preservation Foundation, including Giúp Đọc Nôm và Hán Việt, Tự Điển Chữ Nôm Dẫn Giải, Nguyễn Trãi Quốc Âm Từ Điển, and Taberd’s Dictionary, as well as materials from the Institute of Hán-Nôm Studies, and online resources such as chunom.org.