@ARTICLE{
author={Ullah Zia,Elkadeem Mohamed R,Wang Shaorong,Radosavljevic Jordan N},
year={2020},
title={A Novel PSOS-CGSA Method for State Estimation in Unbalanced DG-Integrated Distribution Systems},
journal={IEEE ACCESS},
volume={8},
number={},
pages={113219-113229},
document_type={Article},
} 

@ARTICLE{
author={Ullah Zia,Wang Shaorong,Radosavljevic Jordan N},
year={2019},
title={A Novel Method Based on PPSO for Optimal Placement and Sizing of Distributed Generation},
journal={IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING},
volume={14},
number={12},
pages={1754-1763},
document_type={Article},
} 

@ARTICLE{
author={Ullah Zia,Wang Shaorong,Radosavljevic Jordan N,Lai Jinmu},
year={2019},
title={A Solution to the Optimal Power Flow Problem Considering WT and PV Generation},
journal={IEEE ACCESS},
volume={7},
number={},
pages={46763-46772},
document_type={Article},
}