English contributed a thousand crusaders under Lord Huntington” Valerii︠a︡ Fol, Bulgaria: History Retold in Brief, (Riga, 1999), 103. Nicolle, David. Constantinople
copie dans la collection Charles de Spoelberch de Lovenjoul: cote E.868 / fol.80-291. George Sand: sa vie et ses œuvres, 1848-1876 (vol. 4)(1926年),第259-260页
André Clergeat and Barry Kernfeld, "Hubert Fol". The New Grove Dictionary of Jazz. 2nd edition, 2001 Hermann Henselmann. catalogue.bnf.fr (Bibliothèque