@ARTICLE{
author={Eckel F|,Brunner T|,Jelic Svetislav B|},
year={2011},
title={Biliary cancer: ESMO Clinical Practice Guidelines for diagnosis, treatment and follow-up},
journal={ANNALS OF ONCOLOGY},
volume={22},
number={},
pages={vi40-vi44},
document_type={Article},
} 

@ARTICLE{
author={Eckel F|,Brunner T|,Jelic Svetislav B|},
year={2010},
title={Biliary cancer: ESMO Clinical Practice Guidelines for diagnosis, treatment and follow-up},
journal={ANNALS OF ONCOLOGY},
volume={21},
number={},
pages={v65-v69},
document_type={Article},
}