Author: I͡Ubileĭnai͡a nauchnai͡a konferent͡sii͡a, posvi͡ashchennai͡a 1200-letii͡u so dni͡a rozhdenii͡a Mukhammada ibn Musy al-Khorezmi (1983 Tashkent, Uzbek S.S.R. and Urgench, Uzbek S.S.R.)