1. Extremely well-differentiated adenocarcinoma of the stomach: Clinicopathological and immunohistochemical features
   Takashi Yao, 2006, World Journal of Gastroenterology CrossRef
2. Long-term Follow-up of Gastric Adenocarcinoma with Chief Cell Differentiation Using Upper Gastrointestinal Tract Endoscopy
   Takashi Abe et al, 2013, Internal Medicine CrossRef