@article{KYB_1973_9_2_a4,
     author = {Sladk\'y, Karel},
     title = {Necessary and sufficient optimality conditions for average reward of controlled {Markov} chains},
     journal = {Kybernetika},
     pages = {124--137},
     year = {1973},
     volume = {9},
     number = {2},
     mrnumber = {0363495},
     zbl = {0254.60062},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1973_9_2_a4/}
}