1. National Policing Improvement Agency (NPIA). Footwear marks recovery manual. http://library.college.police.uk/docs/appref/NPIA-(2007)-Footwear-Marks-Recovery-Manual.pdf (Accessed: 08 May 2019), 2007.
2. D. Baldwin, C. O’Mahoney, 2016. 6. Marks and Impressions, in: P. White (Eds), Crime Scene to Court: The Essentials of Forensic Science, 4th ed., The Royal Society of Chemistry, Cambridge, 2016.
3. W.J. Bodziak, Forensic Footwear Evidence, Taylor & Francis Group., Florida, 2017.
4. A.R.W. Jackson, J.M. Jackson, Forensic Science, 4th ed., Pearson Education Limited., Harlow, 2017.
5. Preservation and Analysis of Three-Dimensional Footwear Evidence in Soils: The Application of Optical Laser Scanning;Bennett,2009