@article{10_4064_ap_11_3_273_281,
     author = {J. Dugundji},
     title = {Existence of {Lyapunov} functions},
     journal = {Annales Polonici Mathematici},
     pages = {273--281},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {1961},
     doi = {10.4064/ap-11-3-273-281},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-11-3-273-281/}
}