Galeo􀆫 N, DiCesare Mannelli L, Mazzan􀆟 G, Bartolini A,Ghelardini C. Menthol: a natural analgesic compound. Neuro science Le􀆩ers. 2002 Apr 12; 322(3): 145-8. 2. Melzack R, Wall PD. Pain mechanisms: a new theory. Science. 1965 Nov 19; 150(699): 971-9. 3. Topp et al. Effects of menthol on skeletal muscle blood flow. 4. Topp R, Winchester LJ, Sannes SH, Mink AM, Kaufman JS, Jacks DE. A comparison of Biofreeze and ice on blood flow, pain and muscle func􀆟on. 5. Bishop B, Greenstein J, Topp R. Effects of Biofreeze vs. ice on acute, non-complicated neck pain. 6. Sarabon N. Reports on the first observa􀆟ons on Biofreeze topical analgesic in Slovenian professional sports prac􀆟ce. 7. Stanos S. Overview of topical analgesics. Pain Medicine News. 2009 Feb: 1-6.