TY  - JOUR
AU  - Vidyasagar Ramchandra Padmawar
TI  - Stratification, Midzuno-Sen Strategy and Nonnegative Unbiased Variance Estimation.
JO  - Metrika
PY  - 1994
SP  - 21
EP  - 27
VL  - 41
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MET_1994__41_5_176490/
ID  - MET_1994__41_5_176490
ER  -