@ARTICLE{
author={Alexandrov Sergei,Vilotic Dragisa,Lyamina EA,Sidjanin Leposava P},
year={2011},
title={Thickness of the layer of intense plastic deformation in the vicinity of the friction surface during upsetting of a cylinder with flat dies},
journal={JOURNAL OF APPLIED MECHANICS AND TECHNICAL PHYSICS},
volume={52},
number={3},
pages={491-495},
document_type={Article},
} 

@ARTICLE{
author={Lyamina EA,Alexandrov Sergei,Vilotic Dragisa,Movrin Dejan},
year={2010},
title={Effect of Shape of Samples on Ductile Fracture Initiation in Upsetting},
journal={STEEL RESEARCH INTERNATIONAL},
volume={81},
number={9},
pages={306-309},
document_type={Article},
}