TY  - JOUR
AU  - R. A. Lelekov
TI  - Necessary and sufficient conditions for convergence of conditional mathematical expectations relative to a~$\sigma$-algebra
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1998
SP  - 1358
EP  - 1359
VL  - 53
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1998_53_6_a13/
LA  - en
ID  - RM_1998_53_6_a13
ER  -