@article{KYB_1987_23_6_a0,
     author = {Mandl, Petr and Romera Ayll\'on, M. Rosario},
     title = {On controlled {Markov} processes with average cost criterion},
     journal = {Kybernetika},
     pages = {433--442},
     year = {1987},
     volume = {23},
     number = {6},
     mrnumber = {922620},
     zbl = {0633.90090},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1987_23_6_a0/}
}