article published in 1983

scientific article published in January 1998

book published in 1985

article published in 1987

article published in 1994

article published in 2004

article by David H. Caldwell & Gordon Ewart published January 1997 in Post-Medieval Archaeology

article published in 1980

scientific article published in October 2004

article by Denys Pringle et al published January 2000 in Post-Medieval Archaeology