@article{LLR09,
author  = {Levandovskyy, V. and Romanovski, V. and Logar, A.},
title     = {The cyclicity of a cubic system},
journal = {{Open Systems \& Information Dynamics}},
volume = {16},
number = {4},
pages = "429--439",
url = {http://dx.doi.org/10.1142/S1230161209000323},
year       = {2009}
}