Correia, A.P., Ribeiro, L.C., Contente, L.F. and de Moura, M.C. 1993. Extracorporeal shockwave lithotripsy in the treatment of gallbladder lithiasis. The first 109 patients. Acta Médica Portuguesa. 6, 7 (Jul. 1993), 307–10. DOI:https://doi.org/10.20344/amp.3109.