@ARTICLE{
author={Petrovic Mirjana,Stefanova Elka D,Ziropadja Ljubomir,Stojkovic Tanja,Kostic Vladimir S},
year={2016},
title={Neuropsychiatric symptoms in Serbian patients with Parkinson's disease},
journal={JOURNAL OF THE NEUROLOGICAL SCIENCES},
volume={367},
number={},
pages={342-346},
document_type={Article},
} 

@ARTICLE{
author={Stefanova Elka D,Ziropadja Ljubomir,Stojkovic Tanja,Stankovic Iva D,Tomic Aleksandra D,Jecmenica-Lukic Milica V,Petrovic Igor N,Kostic Vladimir K},
year={2015},
title={Mild Cognitive Impairment in Early Parkinson's Disease Using the Movement Disorder Society Task Force Criteria: Cross-Sectional Study in Hoehn and Yahr Stage 1},
journal={DEMENTIA AND GERIATRIC COGNITIVE DISORDERS},
volume={40},
number={3-4},
pages={199-209},
document_type={Article},
} 

@ARTICLE{
author={Stankovic Iva D,Stefanova Elka D,Ziropadja Ljubomir,Mijajlovic Milija D,Pavlovic Aleksandra M,Kostic Vladimir S},
year={2015},
title={Transcranial midbrain sonography and depressive symptoms in patients with Parkinson's disease},
journal={JOURNAL OF NEUROLOGY},
volume={262},
number={3},
pages={689-695},
document_type={Article},
} 

@ARTICLE{
author={Stankovic Iva D,Stefanova Elka D,Ziropadja Ljubomir,Pavlovic Aleksandra M,Mijajlovic Milija D,Kostic Velimir},
year={2014},
title={Transcranial parenchymal sonography findings and the structure of depression in patients with Parkinson's disease},
journal={JOURNAL OF NEUROLOGY},
volume={261},
number={},
pages={S120-S120},
document_type={Meeting Abstract},
} 

@ARTICLE{
author={Stefanova Elka D,Jecmenica-Lukic Milica V,Ziropadja Ljubomir,Markovic Vladana V,Stojkovic Tanja,Tomic Aleksandra D,Dragasevic-Miskovic Natasa T,Kostic Vladimir K},
year={2014},
title={Acquisition and Discrimination Set Learning Deficits in Parkinson's Disease with Freezing of Gait},
journal={JOURNAL OF THE INTERNATIONAL NEUROPSYCHOLOGICAL SOCIETY},
volume={20},
number={9},
pages={929-936},
document_type={Article},
} 

@ARTICLE{
author={Stankovic Iva D,Stefanova Elka D,Ziropadja Ljubomir,Pavlovic Aleksandra M,Mijajlovic Milija D,Kostic Vladimir S},
year={2014},
title={Transcranial parenchymal sonography findings and the structure of depression in patients with Parkinson's disease},
journal={EUROPEAN JOURNAL OF NEUROLOGY},
volume={21},
number={},
pages={172-172},
document_type={Meeting Abstract},
} 

@ARTICLE{
author={Stefanova Elka D,Ziropadja Ljubomir,Petrovic Mirjana,Stojkovic Tanja,Kostic Vladimir S},
year={2013},
title={Screening for Anxiety Symptoms in Parkinson Disease: A Cross-Sectional Study},
journal={JOURNAL OF GERIATRIC PSYCHIATRY AND NEUROLOGY},
volume={26},
number={1},
pages={34-40},
document_type={Article},
} 

@ARTICLE{
author={Ziropadja Ljubomir,Stefanova Elka D,Petrovic Mirjana,Stojkovic Tanja,Kostic Vladimir S},
year={2012},
title={Apathy and depression in Parkinson's disease: The Belgrade PD study report},
journal={PARKINSONISM & RELATED DISORDERS},
volume={18},
number={4},
pages={339-342},
document_type={Article},
} 

@ARTICLE{
author={Ziropadja Ljubomir,Stefanova Elka D,Potrebic Aleksandra,Kostic Vladimir S},
year={2009},
title={Quality of life in Serbian patients with Parkinson's disease},
journal={QUALITY OF LIFE RESEARCH},
volume={18},
number={7},
pages={833-839},
document_type={Article},
} 

@ARTICLE{
author={Stefanova Elka D,Potrebic Aleksandra,Ziropadja Ljubomir,Ribaric Ivana,Maric Jelena,Maksimovic A,Kostic Vladimir S},
year={2006},
title={Depression predicts the pattern of cognitive impairment in early Parkinson's disease},
journal={JOURNAL OF THE NEUROLOGICAL SCIENCES},
volume={248},
number={1-2},
pages={300-300},
document_type={Meeting Abstract},
} 

@ARTICLE{
author={Stefanova Elka D,Potrebic Aleksandra,Ziropadja Ljubomir,Maric Jelena,Ribaric Ivana,Kostic Vladimir S},
year={2006},
title={Depression predicts the pattern of cognitive impairment in early Parkinson's disease},
journal={JOURNAL OF THE NEUROLOGICAL SCIENCES},
volume={248},
number={1-2},
pages={131-137},
document_type={Article},
} 

@ARTICLE{
author={Stefanova Elka D,Kostic Vladimir S,Ziropadja Ljubomir,Markovic Milan,Ocic Gordana G},
year={2002},
title={Serial position learning effects in patients with aneurysms of the anterior communicating artery},
journal={JOURNAL OF CLINICAL AND EXPERIMENTAL NEUROPSYCHOLOGY},
volume={24},
number={5},
pages={687-694},
document_type={Article},
} 

@ARTICLE{
author={Stefanova Elka D,Kostic Vladimir S,Ziropadja Ljubomir,Ocic Gordana G,Markovic Milan},
year={2001},
title={Declarative memory in early Parkinson's disease: Serial position learning effects},
journal={JOURNAL OF CLINICAL AND EXPERIMENTAL NEUROPSYCHOLOGY},
volume={23},
number={5},
pages={581-591},
document_type={Article},
} 

@ARTICLE{
author={Stefanova Elka D,Kostic Vladimir S,Ziropadja Ljubomir,Markovic Milan,Ocic Gordana G},
year={2000},
title={Visuomotor skill learning on serial reaction time task in patients with early Parkinson's disease},
journal={MOVEMENT DISORDERS},
volume={15},
number={6},
pages={1095-1103},
document_type={Article},
}