@ARTICLE{
author={Zivkovic Nela,Djindjic Boris J,Stojanovic Sonja K,Krstic Ivana S,Ciric Ivana,Kostic Tomislav L,Kocic Gordana M},
year={2017},
title={5 '-Nucleotidase and adenosine deaminase in patients with rheumatoid arthritis},
journal={VOJNOSANITETSKI PREGLED},
volume={74},
number={10},
pages={940-946},
document_type={Article},
} 

@ARTICLE{
author={Zivkovic Nela,Djindjic Boris J,Dimic Aleksandar N,Aleksandric Jelena,Milovanovic Svetlana},
year={2012},
title={Importance of adenosine deaminase in rheumatoid arthritis diagnosis and therapeutic effect of applied methotrexate},
journal={HEALTHMED},
volume={6},
number={8},
pages={2923-2928},
document_type={Article},
}