Whitley, Catrina Banks; Kramer, Kyra (2010). "A New Explanation for the Reproductive Woes and Midlife Decline of Henry Viii". The Historical Journal. 53 (4): 827–848. doi:10.1017/S0018246X10000452. S2CID159499333.
Whitley, Catrina Banks; Kramer, Kyra (2010). "A New Explanation for the Reproductive Woes and Midlife Decline of Henry Viii". The Historical Journal. 53 (4): 827–848. doi:10.1017/S0018246X10000452. S2CID159499333.