@article{TAM_1989_15_1_a14,
     author = {Veljko V. Vuji\v{c}i\'c and V. V. Kozlov},
     title = {ON the stability of the equilibrium in the non-potential forces field},
     journal = {Theoretical and applied mechanics},
     pages = {139 },
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAM_1989_15_1_a14/}
}