Chien JY, Yu CJ (2005). "Images in clinical medicine. Malposition of a Sengstaken-Blakemore tube". N. Engl. J. Med. 352 (8): e7. doi:10.1056/NEJMicm040003. PMID15728803.
Chien JY, Yu CJ (2005). "Images in clinical medicine. Malposition of a Sengstaken-Blakemore tube". N. Engl. J. Med. 352 (8): e7. doi:10.1056/NEJMicm040003. PMID15728803.