@article{Elets_Masharov_2009, title={On one extremal problem of Pompeiu sets}, volume={61}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/3001}, abstractNote={We determine upper bounds for the least radius of a ball in which a given set is a Pompeiu set (the set considered is a half right circular cone). The obtained estimates significantly improve known results.}, number={1}, journal={Ukrainsâ€™kyi Matematychnyi Zhurnal}, author={Elets, L. V. and Masharov, P. A.}, year={2009}, month={Jan.}, pages={61-72} }