@article{PA_2016_5_1_a4,
     author = {S. L. Wali and W. M. Shah and A. Liman},
     title = {Inequalities concerning $B$-operators},
     journal = {Problemy analiza},
     pages = {55--72},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PA_2016_5_1_a4/}
}