1 2 Burgundy and Provence, 879-1032, Constance Brittain Bourchard, The New Cambridge Medieval History: Volume 3, c.900-c.1024, ed. Rosamond McKitterick and Timothy Reuter, (Cambridge University Press, 1999), p. 342.
↑ Burgundy and Provence, 879-1032, Constance Brittain Bourchard, The New Cambridge Medieval History: Volume 3, c.900-c.1024, p. 335.