@article{CMUC_1967_8_2_a6,
     author = {Nagy, Jozef},
     title = {Lyapunov's direct method in abstract local semi-flows},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {257--266},
     year = {1967},
     volume = {8},
     number = {2},
     mrnumber = {0213671},
     zbl = {0162.39901},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1967_8_2_a6/}
}