@article{NUMA_1991__59_8_133536,
     author = {G.W. Stewart and G. Zhang},
     title = {On a direct method for the solution of nearly uncoupled {Markov} chains.},
     journal = {Numerische Mathematik},
     pages = {1--12},
     publisher = {mathdoc},
     volume = {59},
     number = {8},
     year = {1991},
     zbl = {0697.65016},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1991__59_8_133536/}
}