Robert Stemmer Library (February 2013). "Compression Bulletin 24"(PDF). Sigvaris. p. 2 "Comment". Archived from the original(PDF) on 20 June 2015. Retrieved 21 August 2013.
Robert Stemmer Library (February 2013). "Compression Bulletin 24"(PDF). Sigvaris. p. 2 "Comment". Archived from the original(PDF) on 20 June 2015. Retrieved 21 August 2013.