VN Rubanovskii, SI Stepanov - Journal of Applied …, 1969 - ui.adsabs.harvard.edu
On the Routh theorem and the Chetaev method for constructing the liapunov function from the
integrals of the equations of motion: PMM vol. 33, n≗5, 1969, pp. 904–912 - NASA/ADS Now on …