1. Stubblefield, H.: Cut and scratches. Healthline.
http://www.healthline.com/health/cuts-scratches#Overview1
(2016). Accessed 19 July 2016
2. Blahd, W.H., Husney, A., Gabica J.M.: Scrapes. HealthLinkBC.
https://www.healthlinkbc.ca/health-topics/srape
(2016). Accessed 27 May 2016
3. Dunkin, C.S., Pleat, J.M., Gillespie, P.H., Tyler, M.P., Roberts, A.H., McGrouther, D.A.: Scarring occurs at a critical depth of skin injury: precise measurement in a graduated dermal scratch in human volunteers. Plast. Reconstr. Surg. 119(6), 1722–1732 (2007)
4. Kyouko, O.: Current status of the introduction of lower extremity functional training with the robot suit hal in our hospital. Jpn. J. Press. Ulcers 16(3), 289 (2014)
5. Sanders, J.E., Goldstein, B.S., Leotta, D.F.: Skin response to mechanical stress: adaptation rather than breakdown-a review of the literature. J. Rehabil. Res. Dev. 32(3), 214–226 (1995)