Guide. [2021-12-19]. (原始内容存档于2021-12-19). CodeConventions for the Java Programming Language - Naming Conventions. Oracle. [2021-08-03]. (原始内容存档于2021-03-10)
,要佔用本来属於ASCII控制字符的位置。 ASCII ISO/IEC 646 ISO/IEC 8859 VIQR RFC 1456 – Conventions for Encoding the Vietnamese Language (VISCII và VIQR) Vietnamese-Standard