1. “Musculoskeletal Conditions – the second greatest cause of disability.” [Online]. http://bjdonline.org/musculoskeletal-conditions-the-second-greatest-cause-of-disability-2/ (accessed 27.01.17).
2. R. Wittenauer, L. Smith, K. Aden, Background Paper 6.12, Osteoarthritis, World Health Organization, 2013. http://www.who.int/medicines/areas/priority_medicines/BP6_12Osteo.pdf (accessed 09.11.16).
3. ] WHO Scientific Group On The Assessment Of Oosteoporosis At Primary Health Care Level, WorldHealthOrganization, 2004. http://www.who.int/chp/topics/Osteoporosis.pdf?ua=1 (accessed 09.11.16).
4. Structure and applications of poly(vinyl alcohol) hydrogels produced by conventional crosslinking or by freezing/thawing methods;Hassan;Adv. Polym. Sci.,2000
5. Poly(vinyl alcohol) – biodegradable vinyl material;Pająk;Chemik,2010