@ARTICLE{
author={Shapovalova Alla I,Popovic Luka C,Chavushyan Vahram H,Burenkov Alexander N,Ilic Dragana J,Kollatschny Wolfram,Kovacevic Andjelka B,Valdes JR,Patino-Alvarez V,Leon-Tavares J,Torrealba J,Zhdanova VE},
year={2016},
title={First Long-Term Optical Spectral Monitoring of a Binary Black Hole Candidate E1821+643. I. Variability of Spectral Lines and Continuum},
journal={ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES},
volume={222},
number={2},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Popovic Luka C,Shapovalova Alla I,Ilic Dragana J,Burenkov Alexander N,Chavushyan Vahram H,Kollatschny Wolfram,Kovacevic Andjelka B,Valdes JR,Leon-Tavares J,Bochkarev Nikolai G,Patino-Alvarez V,Torrealba J},
year={2014},
title={Spectral optical monitoring of the double-peaked emission line AGN Arp 102B II. Variability of the broad line properties},
journal={ASTRONOMY & ASTROPHYSICS},
volume={572},
number={},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Leon-Tavares J,Chavushyan V,Patino-Alvarez V,Valtaoja E,Arshakian TG,Popovic Luka C,Tornikoski M,Lobanov A,Carraminana A,Carrasco L,Lahteenmaki A},
year={2013},
title={FLARE-like variability of the Mg II lambda 2800 emission line in the gamma-RAY BLAZAR 3C 454.3},
journal={ASTROPHYSICAL JOURNAL LETTERS},
volume={763},
number={2},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Shapovalova Alla I,Popovic Luka C,Burenkov Alexander N,Chavushyan Vahram H,Ilic Dragana J,Kovacevic Andjelka B,Kollatschny Wolfram,Kovacevic Jelena M,Bochkarev Nikolay G,Valdes JR,Torrealba J,Leon-Tavares J,Mercado Abelardo,Benitez E,Carrasco L,Dultzin D,de la Fuente E},
year={2012},
title={Spectral Optical Monitoring of the Narrow-Line Seyfert 1 Galaxy Ark 564},
journal={ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES},
volume={202},
number={1},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Popovic Luka C,Shapovalova Alla I,Ilic Dragana J,Kovacevic Andjelka B,Kollatschny Wolfram,Burenkov Alexander N,Chavushyan Vahram H,Bochkarev Nikolai G,Leon-Tavares J},
year={2011},
title={Spectral optical monitoring of 3C 390.3 in 1995-2007 II. Variability of the spectral line parameters},
journal={ASTRONOMY & ASTROPHYSICS},
volume={528},
number={},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Ilic Dragana J,Shapovalova Alla I,Popovic Luka C,Burenkov Alexander N,Chavushyan Vahram H,Kovacevic Andjelka B,Bochkarev Nikolai G,Leon-Tavares J},
year={2010},
title={Long-Term Variability of the Broad H alpha and H beta Emission-Line Profiles of NGC 4151},
journal={CO-EVOLUTION OF CENTRAL BLACK HOLES AND GALAXIES},
volume={267},
number={},
pages={400-400},
document_type={Proceedings Paper},
} 

@ARTICLE{
author={Ilic Dragana J,Popovic Luka C,Shapovalova Alla I,Leon-Tavares J,Chavushyan Vahram H},
year={2010},
title={Possible Outflow in the Broad Line Region of Active Galactic Nuclei},
journal={ACCRETION AND EJECTION IN AGN : A GLOBAL VIEW},
volume={427},
number={},
pages={110-111},
document_type={Proceedings Paper},
} 

@ARTICLE{
author={Shapovalova Alla I,Popovic Luka C,Burenkov Alexander N,Chavushyan Vahram H,Ilic Dragana J,Kollatschny Wolfram,Kovacevic Andjelka B,Bochkarev Nikolai G,Carrasco L,Leon-Tavares J,Mercado Abelardo,Valdes JR,Vlasuyk VV,De la Fuente E},
year={2010},
title={Spectral optical monitoring of 3C 390.3 in 1995-2007 I. Light curves and flux variation in the continuum and broad lines},
journal={ASTRONOMY & ASTROPHYSICS},
volume={517},
number={},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Shapovalova Alla I,Popovic Luka C,Burenkov Alexander N,Chavushyan Vahram H,Ilic Dragana J,Kovacevic Andjelka B,Bochkarev Nikolai G,Leon-Tavares J},
year={2010},
title={Long-term variability of the optical spectra of NGC4151 II. Evolution of the broad H alpha and H beta emission-line profiles},
journal={ASTRONOMY & ASTROPHYSICS},
volume={509},
number={},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Shapovalova Alla I,Popovic Luka C,Collin S,Burenkov Alexander N,Chavushyan Vahram H,Bochkarev Nikolay G,Benitez E,Dultzin D,Kovacevic Andjelka B,Borisov N,Carrasco L,Leon-Tavares J,Mercado Abelardo,Valdes JR,Vlasuyk VV,Zhdanova VE},
year={2008},
title={Long-term variability of the optical spectra of NGC 4151 - I. Light curves and flux correlations},
journal={ASTRONOMY & ASTROPHYSICS},
volume={486},
number={1},
pages={99-U81},
document_type={Article},
}