@article{SMJ2_1996_22_2_a1,
     author = {Stamov, G.},
     title = {Application of {Lyapunov's} {Direct} {Method} to the {Existence} of {Integral} {Manifolds} of {Impulsive} {Differential} {Equations}},
     journal = {Serdica Mathematical Journal},
     pages = {83--90},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_1996_22_2_a1/}
}