C. T. Kawano, M. M. R. dos Santos, M. G. de Oliveira, and T. C. Ourivio, “Trapezoidal osteochondral autologous plug singleblock graft for treating chondral lesions of the knee: clinical and functional medium-term results in an observational study”, Clinics, vol. 67, no. 10, pp. 1191–1195, Oct. 2012, doi: 10.6061/clinics/2012(10)11.