I'd like to point to excellent article written by Ivan Lavrinenko about Erich Hartmann's (over)claims during the Yassy campaign in late May/early June 1944. With the help of deepl or google translate the non-Russian speakers will be able to understand most of it as well:
https://warspot.ru/3125-hartman-nad-...gDP7Dr2PS4N2Gk
Boris