@article{PS_2000__4__229_0,
     author = {Sonsino, Doron},
     title = {A lemma on proximity of variances and expectations},
     journal = {ESAIM: Probability and Statistics},
     pages = {229--231},
     year = {2000},
     publisher = {EDP Sciences},
     volume = {4},
     mrnumber = {1808332},
     zbl = {0965.60008},
     language = {en},
     url = {https://www.numdam.org/item/PS_2000__4__229_0/}
}