https://www.proz.com/personal-glossaries/entry/28001612-a-or-au-%2A%2A-phys-angstrom-or-angstrom-unit-%D8%A3-%D8%B1%D9%85%D8%B2-%D9%84%D9%84%D8%A7%D9%86%D8%AC%D8%B3%D8%AA%D8%B1%D9%88%D9%85-%D9%88%D8%AD%D8%AF%D8%A9-%D8%AA%D8%B3%D8%A7%D9%88%D9%8A-%D8%AC%D8%B2%D8%A1%D8%A7-%D9%85%D9%86-%D8%B9%D8%B4%D8%B1%D8%A9-%D9%85%D9%84%D8%A7%D9%8A%D9%8A%D9%86-%D9%85%D9%86-%D8%A7%D9%84%D9%85%D9%84%D9%8A%D9%85%D8%AA%D8%B1