@article{SMJ2_2008_34_3_a7,
     author = {Anastassiou, George A.},
     title = {Ostrowski {Type} {Inequalities} over {Spherical} {Shells}},
     journal = {Serdica Mathematical Journal},
     pages = {629--650},
     publisher = {mathdoc},
     volume = {34},
     number = {3},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2008_34_3_a7/}
}