@ARTICLE{
author={Hedrih (Stevanovic) Katica R,Fidlin Alexander,Lurie Konstantin,Rega Giuseppe,Sperling Lutz},
year={2021},
title={Obituary: Professor Ilya I. Blekhman (29 November 1928-03 February 2021)},
journal={NONLINEAR DYNAMICS},
volume={104},
number={1},
pages={1-12},
document_type={Biographical-Item},
} 

@ARTICLE{
author={Kovacic Ivana N,Rega Giuseppe,Zukovic Miodrag M},
year={2012},
title={On the influence of a constant force on the appearance of period-doubling bifurcations and chaos in a harmonically excited pure cubic oscillator},
journal={CHAOS SOLITONS & FRACTALS},
volume={45},
number={12},
pages={1531-1540},
document_type={Article},
}