Parrott 1997, p. 22. Parrott, David (1997). "The Mantuan Succession, 1627–31: A Sovereignty Dispute in Early Modern Europe". The English Historical Review. CXII, Issue 445, February (445). Oxford Academic: 20–65. doi:10.1093/ehr/CXII.445.20.
Parrott 1997, p. 37. Parrott, David (1997). "The Mantuan Succession, 1627–31: A Sovereignty Dispute in Early Modern Europe". The English Historical Review. CXII, Issue 445, February (445). Oxford Academic: 20–65. doi:10.1093/ehr/CXII.445.20.