Fardetti, Davide, et al. “Cartilage Disorders in Symptomatic Knee Osteoarthritis and Chondrocalcinosis: An Ultrastructural Study”. Italian Journal of Anatomy and Embryology, vol. 120, no. 1, Sept. 2015, p. 145, https://oajournals.fupress.net/index.php/ijae/article/view/4099.