%0 Journal Article %A Oscar Vega-Amaya %A Fernando Luque-Vásquez %T Sample-path average cost optimality for semi-Markov control processes on Borel spaces: unbounded costs and mean holding times %J Applicationes Mathematicae %D 2000 %P 343-367 %V 27 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-27-3-343-367/ %R 10.4064/am-27-3-343-367 %G en %F 10_4064_am_27_3_343_367