1. Gibbons, P. Preparation and use of lime mortars: Technical Advice Note 1. Historic Scotland, HMSO, Edinburgh. (1995) (revised edition 2003).
2. Energy efficiency and historic buildings;McKaig,2018
3. A framework for specifying natural hydraulic lime mortars for masonry construction;Forster;Structural Survey,2011
4. STBA, Responsible retrofit of traditional buildings. Sustainable Traditional Buildings Alliance, London, 2012 available at: www.sdfoundation.org.uk/downloads/responsible-retrofit_final_20_sept_2012.pdf.
5. Old house eco handbook: A practical guide to retrofitting for energy efficiency and sustainability;Suhr,2013