@ARTICLE{
author={Houshfar Ehsan,Skreiberg Oyvind,Todorovic Dusan M,Skreiberg Alexandra,Lovas Terese,Jovovic Aleksandar M,Sorum Lars},
year={2012},
title={NOx emission reduction by staged combustion in grate combustion of biomass fuels and fuel mixtures},
journal={FUEL},
volume={98},
number={},
pages={29-40},
document_type={Article},
} 

@ARTICLE{
author={Houshfar Ehsan,Skreiberg Oyvind,Lovas Terese,Todorovic Dusan M,Sorum Lars},
year={2011},
title={Effect of Excess Air Ratio and Temperature on NOx Emission from Grate Combustion of Biomass in the Staged Air Combustion Scenario},
journal={ENERGY & FUELS},
volume={25},
number={10},
pages={4643-4654},
document_type={Article},
}