2006, Natural gas-steam-thermal springs in combined therapy of osteomuscular system diseases 18. Februar 2020 Badretdinov RR, Fomin AA, Badretdinova LM Vopr Kurortol Fizioter Lech Fiz Kult. 2006 Jan-Feb;(1):24-7. https://www.ncbi.nlm.nih.gov/pubmed/16752740