@article{NUMA_1993__65_4_133728,
     author = {G.W. Stewart},
     title = {On the perturbation of {Markov} chains with nearly transient states.},
     journal = {Numerische Mathematik},
     pages = {135--142},
     publisher = {mathdoc},
     volume = {65},
     number = {4},
     year = {1993},
     zbl = {0797.15019},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1993__65_4_133728/}
}