@article{MET_1986__33_176034,
     author = {K. Takeuchi and M. Akahira},
     title = {A {Note} on {Minimum} {Variance.}},
     journal = {Metrika},
     pages = {85--91},
     publisher = {mathdoc},
     volume = {33},
     year = {1986},
     zbl = {0588.62039},
     url = {http://geodesic.mathdoc.fr/item/MET_1986__33_176034/}
}