A. Young
发表
J. Close-Brooks,
D. Breeze,
J. Ritchie,
1976,
Britannia.
P. Cundill,
G. Cook,
D. Lunt,
1997,
Proceedings of the Society of Antiquaries of Scotland.
W. Boyd,
D. Caldwell,
F. Hunter,
1999,
Proceedings of the Society of Antiquaries of Scotland.
L. Barnetson,
P. Hulme,
C. Wickham-Jones,
1983
.