TY  - JOUR
AU  - Zaharopol, Radu
TI  - On Products of Conditional Expectation Operators
JO  - Canadian mathematical bulletin
PY  - 1990
SP  - 257
EP  - 260
VL  - 33
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1990-041-3/
DO  - 10.4153/CMB-1990-041-3
ID  - 10_4153_CMB_1990_041_3
ER  -