M. Kostić, A. . Sretenović, M. . Savić, M. . Popović, S. . Kostić, and D. . Stamenović, “How to assess chest wall deformity in children with pectus excavatum – evaluation of the agreement among methods”, Vojnosanit Pregl, vol. 78, no. 3, Mar. 2021, doi: 10.2298/VSP190430071K.