@ARTICLE{
author={Stankovic Velizar D,Outarra L,Zonnevijlle F,Comninellis Ch},
year={2008},
title={Solvent extraction of silver from nitric acid solutions by calix[4]arene amide derivatives},
journal={SEPARATION AND PURIFICATION TECHNOLOGY},
volume={61},
number={3},
pages={366-374},
document_type={Article},
} 

@ARTICLE{
author={Stankovic Velizar D,Duo I,Comninellis Ch,Zonnevijlle F},
year={2007},
title={Silver electrowinning from silver(I) - calixarene complexes by two-phase electrolysis},
journal={JOURNAL OF APPLIED ELECTROCHEMISTRY},
volume={37},
number={11},
pages={1279-1286},
document_type={Article},
}