[1] [CITE[Open Document Format for Office Applications (OpenDocument) Version 1.3. Part 3: OpenDocument Schema]], [TIME[2019-12-25T17:00:00.000Z]], [TIME[2020-10-23T12:45:44.793Z]] <https://docs.oasis-open.org/office/OpenDocument/v1.3/cs01/part3-schema/OpenDocument-v1.3-cs01-part3-schema.html#property-style_glyph-orientation-vertical>

[2] [CITE@EN[Extensible Stylesheet Language (XSL) Version 2.0]], [TIME[2018-10-09T13:22:10.000Z]], [TIME[2020-10-23T12:55:38.423Z]] <https://www.w3.org/TR/xslfo20/#writing-mode-related>