@article{10_4064_sm144_2_2,
     author = {Alexey N. Karapetyants},
     title = {On $L_p$-$L_q$ boundedness for convolutions with
kernels having singularities on a sphere},
     journal = {Studia Mathematica},
     pages = {121--134},
     year = {2001},
     volume = {144},
     number = {2},
     doi = {10.4064/sm144-2-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm144-2-2/}
}