@article{10_4153_S0008414X19000609,
     author = {Sendov, Blagovest and Sendov, Hristo},
     title = {Sector {Analogue} of the {Gauss{\textendash}Lucas} {Theorem}},
     journal = {Canadian journal of mathematics},
     pages = {318--338},
     year = {2021},
     volume = {73},
     number = {2},
     doi = {10.4153/S0008414X19000609},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008414X19000609/}
}