https://support.sas.com/documentation/cdl/en/odsug/61723/HTML/default/viewer.htm#a002423839.htm Introduction to ODS Language Statements
https://pharma-sas.com/how-to-customize-rtf-output-using-unicode-and-rtf-code/ How to customize RTF output using Unicode and RTF code
https://www.unicode.org/charts/ Unicode 15.1 Character Code Charts