@article{sudintas_paškevičius_patašienė_ragulskis_2015, 
  title={Uncertainty of measurement of eigenfrequency using a dynamically directed vibroexciter}, 
  abstractNote={Measurement of eigenfrequency using a dynamically directed vibroexciter is investigated. Lyapunov indicators are calculated for various values of parameters of the system. It is shown that when the frequency of excitation coincides with the eigenfrequency there is a positive Lyapunov indicator. Thus chaotic motion takes place and causes uncertainty in the measurement of eigenfrequency.}, 
  publisher={JVE International}, 
  author={Sudintas and Paškevičius and Patašienė and Ragulskis}, 
  year={2015}
  }