1968, William J. Bouwsma, Venice and the Defense of Republican Liberty: Renaissance Values in the Age of Counter Reformation, page 81:
In this war Sixtus IV had been allied with Venice; but, the conflict going badly in the Papal State, he suddenly made a separate peace […]
1974, P. J. Jones, The Malatesta of Rimini and the Papal State: A Political History, page 92:
In later retrospect, indeed, the middle decades of the fourteenth century may be seen to foreshadow a radical change in the balance of power within the Papal State, […]
