On First Integrals Of The Equations Of Motion Of The Form dxi/dt = aij ∂Φ/∂xj Lazar Rusov — 1968 Publications de l'Institut Mathématique
On some first integrals of equations of motion. Lazar Rusov — 1965 Publications de l'Institut Mathématique [Elektronische Ressource]
On Some First Integrals Of Equations Of Motion Lazar Rusov — 1965 Publications de l'Institut Mathématique