@article{10_4153_S0008439523000681,
     author = {Sakata, Shigehiro},
     title = {Convexity of the radial sum of a star body and a ball},
     journal = {Canadian mathematical bulletin},
     pages = {289--303},
     year = {2024},
     volume = {67},
     number = {2},
     doi = {10.4153/S0008439523000681},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439523000681/}
}