Lanzetta, Marco. “Osteoarthritis of the Hand. Natural Treatment Based on Boswellia Serrata, Zingiber Officinale, Turmeric, Willow Bark, Capsaicin and Green Lipped Muscles from New Zealand: A Study of Strength, Movement and Pain”. Progress in Nutrition, vol. 16, no. 3, Oct. 2014, pp. 233-6, https://mattioli1885journals.com/index.php/progressinnutrition/article/view/4023.