@article{10_4153_CMB_2004_053_5,
     author = {Jain, Pankaj and Jain, Pawan K. and Gupta, Babita},
     title = {Compactness of {Hardy-Type} {Operators} over {Star-Shaped} {Regions} in ${{\mathbb{R}}^{N}}$},
     journal = {Canadian mathematical bulletin},
     pages = {540--552},
     year = {2004},
     volume = {47},
     number = {4},
     doi = {10.4153/CMB-2004-053-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2004-053-5/}
}