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ISANI, M.A. The Vogue of Omar Khayyám in America. In: Comparative Literature Studies, vol. 17 (1977), nr. 3, p. 256-273

ARBERRY, A.J. The romance of the Rubáiyát. Edward FitzGerald's first edition reprinted with introduction and notes. London, Allen and Unwin, 1959

REMPIS, Chr. Beiträge zur Hayyâm-Forschung. Leipzig, Deutsche Morgenländische Gesellschaft, 1937. - Nachdr.: Nendeln, Kraus, 1966

CSILLIK, Bartholomew. The principal manuscripts of the Rubá'iyyat of 'Umar-I-Khayyám in the Bibliothèque Nationale Paris ; transcribed and ed. with introd. notes by Bartholomew [Bertalan] Csillik. - London/Szeged, 1934

POTTER, A.G. A bibliography of the Rubáiyát of Omar Khayyám; together with kindred matter in prose and verse pertaining thereto [20.696 KB] ; collected and arranged by Ambrose George Potter. - London, Ingpen and Grant, 1929. - Heruitgave: Hildesheim [etc.], Olms, 1994

THONET, Jeanne-Marie. Etude sur Edward FitzGerald et la littérature persane, d'après les sources originales par Jeanne-Marie Thonet. - Paris, Édouard Champion, 1929. - (Bibliothèque de la Faculté de philosohpie et lettres de l'Université de Liége; fascicule XLI)

CHRISTENSEN, Arthur. Critical studies in the Rubá'iyát of 'Umar-I-Khayyám; a revised text with English translation by Arthur Christensen. - Kobenhavn, Host, 1927. (Det Kgl. Danske Videnskabernes Selskab.; Historisk-filologiske Meddedelser. XIV, 1)

CHRISTENSEN, A. Critical studies in the Rubáiyát of 'Umar-i-Khayyám. København, 1927

PATTINSON, J.S. The symbolism of the Rubáiyát of Omar Khayyám by J.S. Pattinson. - Edinburgh, Orpheus Publishing House, 1921

BROWNE, E.G. A literary history of Persia. Vol. II. London, 1906, p. 246-259

CHRISTENSEN, Arthur. Recherches sur les Rubá'iyát de 'Omar Hayyám par Arthur Christensen. - Heidelberg, Carl Winters Universität, 1905

HERON-ALLEN, E. The Rubá'iyát of Omar Khayyám, being a facsimile of the manuscript in the Bodleian Library. London, 1898

HERON-ALLEN, E. Some side-lights upon Edward FitzGerald's poem The ruba'iyat of Omar Khayyam. London : Nichols, 1898

ZHUKOVSKI, V. Umar Khayyam and the Wandering Quatrains. Vert. van E.D. Ross. In: Journal of the Royal Asiatic Society, vol XXX, 1898

DOLE, Nathan Haskell. Rubáiyát of Omar Khayyám; English, French and German translations comparatively arranged in accordance with the text of Edward FitzGerald's version; with further selections, notes, biographies, bibliography and other material collected and edited by Nathan Haskell Dole. - Boston, Joseph Knight, 1896 (2 vols.)

MEINSMA, O. Omar Chajjam van Nischapoer en zijn plaats in de Perzische literatuur. In: De Gids, vierde serie, vol. 9, 1891, p. 504-534

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GARCIN DE TASSEY, M. Note sur les Rubâ'iyât de 'Omar Khaïyâm [246 KB] . In: Journal Asiatique, vol. 1, tome 9, p. 548-554