@article{MET_1983__30_175890,
     author = {L.S. Hayre},
     title = {Sequential {Estimation} of the {Difference} {Between} the {Means} of {Two} {Normal} {Populations.}},
     journal = {Metrika},
     pages = {101--107},
     publisher = {mathdoc},
     volume = {30},
     year = {1983},
     zbl = {0521.62066},
     url = {http://geodesic.mathdoc.fr/item/MET_1983__30_175890/}
}