1. Biology of Disease and Prognostic Factors of Cholangiocarcinomas
   Arthur Zimmermann, 2016, Tumors and Tumor-Like Lesions of the Hepatobiliary Tract CrossRef
2. Biology of Disease and Prognostic Factors of Cholangiocarcinomas
   Arthur Zimmermann, 2017, Tumors and Tumor-Like Lesions of the Hepatobiliary Tract CrossRef