@article{MET_1996__43_3_176650,
     author = {Enrique Del Castillo},
     title = {Run {Length} {Distributions} and {Economic} {Design} of {X} {Charts} with {Unknown} {Process} {Variance.}},
     journal = {Metrika},
     pages = {189--202},
     publisher = {mathdoc},
     volume = {43},
     number = {3},
     year = {1996},
     zbl = {0897.62113},
     url = {http://geodesic.mathdoc.fr/item/MET_1996__43_3_176650/}
}