D. T. . Trung, T. P. Son, T. . Chu Dinh, and T. Chu Dinh, ““False Patellar Duplication” Originated from Synovial Osteochondromatosis in Knee Joint: A Rare Case Report”, Open Access Maced J Med Sci, vol. 7, no. 24, pp. 4347–4350, Dec. 2019.