DE-REN, S. Ten-year follow-up of esophageal cancer treated by radical radiation therapy : analysis of 869 patients. Int J Radiat Oncol Biol Phys. 1989, 16, 329-334
NEWAISHY, GA. Results of radical radiotherapy of squamous cell carcinoma of the esophagus. Clin Radiol. 1982, 33, 347-352
OKAWA, T. Results of radiotherapy for inoperable locally advanced esophageal cancer. Int J Radiat Oncol Biol Phys. 1989, 17, 49-54