Un traité de Métaphysique de Omar Hayyâm, Arthur Christensen, in Le Monde Oriental, vol. 1-2, Uppsala, 1906; (digitalized by the University of Toronto).
Introduction and translation of an inedited treaty, without title, found in 1905 by A. Christensen among the persian manuscripts of the Bibliothèque Nationale de France.
(1099?) Omar Khayyâm – Traité de métaphysique (trad. A. Christensen)