@article{01124663,
title = {Two sandwich theorems for linear operators and the moment problem.},
journal = {Balkan Journal of Geometry and its Applications (BJGA)},
volume = {1},
year = {1996},
pages = {75-85},
zbl = {0889.47011},
language = {en},
url = {http://dml.mathdoc.fr/item/01124663}
}
Olteanu, Octav. Two sandwich theorems for linear operators and the moment problem.. Balkan Journal of Geometry and its Applications (BJGA), Tome 1 (1996) pp. 75-85. http://gdmltest.u-ga.fr/item/01124663/