ON EULER-LAGRANGE EQUATIONS WITH NON-BU-POTENTIAL DENSITIES OF FORCES СтатьяBudochkina S.A, Savchin V.M.Optimization and applications (OPTIMA-2014): abstracts of the V International Conference on Optimization Methods and Applications. Petrovac, Montenegro, September 28 – October 4, 2014. 2014. С. 41-41