@ARTICLE{
author={Milivojevic Milan M,Pavlou Stavros,Bugarski Branko M},
year={2012},
title={Liquid velocity in a high-solids-loading three-phase external-loop airlift reactor},
journal={JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY},
volume={87},
number={11},
pages={1529-1540},
document_type={Article},
} 

@ARTICLE{
author={Milivojevic Milan M,Pavlou Stavros,Pajic-Lijakovic Ivana S,Bugarski Branko M},
year={2007},
title={Dependence of slip velocity on operating parameters of air-lift bioreactors},
journal={CHEMICAL ENGINEERING JOURNAL},
volume={132},
number={1-3},
pages={117-123},
document_type={Article},
}