Donald E. Queller, Thomas F. Madden, The fourth crusade. The conquest of Constani- nople. Second edition. With an essav on primary sources by Alfred J. Andrea, Univer sity of Pennsylvania Press, Philadelphia 1997, s. 357+7 nlb., mapy. - Pentek, Zdzisław (Balcanica Posnaniensia. Acta et studia, 2003)