@ARTICLE{
author={Nestorovic Tamara N,Marinkovic Dragan Z,Shabadi Somu,Trajkov Miroslav},
year={2014},
title={User defined finite element for modeling and analysis of active piezoelectric shell structures},
journal={MECCANICA},
volume={49},
number={8},
pages={1763-1774},
document_type={Article},
} 

@ARTICLE{
author={Marinkovic Dragan Z,Nestorovic Tamara N,Marinkovic Zoran,Trajkov Miroslav},
year={2012},
title={Modelling and Simulation of Piezoelectric Adaptive Structures},
journal={TRANSACTIONS OF FAMENA},
volume={36},
number={1},
pages={25-34},
document_type={Article},
} 

@ARTICLE{
author={Nestorovic Tamara N,Marinkovic Dragan Z,Chandrashekar Gurudutt,Marinkovic Zoran,Trajkov Miroslav},
year={2012},
title={Implementation of a user defined piezoelectric shell element for analysis of active structures},
journal={FINITE ELEMENTS IN ANALYSIS AND DESIGN},
volume={52},
number={},
pages={11-22},
document_type={Article},
}