varia

The oxia and varia are represented using the regular acute and grave accent characters, the dialytika with the regular diaeresis character, and the psili and dasia are represented using the regular combining-comma-above and combining-reversed-comma-above characters.

2003, Richard Gillam, “The Greek Alphabet”, in Unicode Demystified: A Practical Programmer’s Guide to the Encoding Standard, Boston, Mass.: Addison-Wesley, →ISBN, part II (Unicode in Depth: A Guided Tour of the Character Repertoire), chapter 7 (Scripts of Europe), page 240

In Morton Smith’s writings we can see that he is trying to follow the grammatical rules, as his accent marks are always carefully placed, specially^([sic]) the oxia and varia with their right or left slant.

[2009?], Venetia Anastasopoulou, Experts Report Handwriting Examinations, [Washington, D.C.]: [Biblical Archaeology], →OCLC, page 17

[T]he author thought of using the Greek small letter iota with psili and varia (ἲ) and ἵ small letter iota with psili and oxia which the author found as the only current fitting option for use here.

2023, Mahmud Mohammed Momoh, “Vowels and the Igala Language Resources”, in Rooweither Mabuya, Don Mthobela, Mmasibidi Setaka, Menno Van Zaanen, editors, Proceedings of the Fourth Workshop on Resources for African Indigenous Languages (RAIL 2023), Dubrovnik: Association for Computational Linguistics, →DOI, section 2 (Vowels and Words in Igala Language), pages 109–110