S. E. A. Araujo, “ Conventional approach x laparoscopic abdominoperineal resection for rectal cancer treatment after neoadjuvant chemoradiation: results of a prospective randomized trial ”, Rev. Hosp. Clín., vol. 58, no. 3, pp. 133–140, Jan. 2003, doi: 10.1590/S0041-87812003000300002.