Low rectal cancer: impacto of radiation and chemotherapy on surgical treatment - Habr Gama, Angelita; Souza, Pedro M Santinho B; Ribeiro Junior, Ulysses; Nadalin, Wladimir; Gansl, René; Sousa Junior, Afonso H S; Campos, Fábio Guilherme; Gama Rodrigues, Joaquim José (Disease Colon & Rectum, 1998)