@article{article0a392833,
title   = {A shape optimization approach to the problem of covering a two-dimensional region with minimum-radius identical balls},
author = {Birgin, Ernesto Julian Goldberg and Laurain, Antoine and Massambone, Rafael and Santana, Arthur Gabriel},
year = {2021},
doi = {10.1137/20M135950X},
journal   = {SIAM Journal on Scientific Computing}
}