@article{10_4153_S0008439521000199,
     author = {Karapetrovi\'c, Boban},
     title = {Volume integral means over spherical shell},
     journal = {Canadian mathematical bulletin},
     pages = {180--197},
     year = {2022},
     volume = {65},
     number = {1},
     doi = {10.4153/S0008439521000199},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439521000199/}
}