@article{AGMS_2017_5_1_a1,
     author = {Dorninger, Dietmar},
     title = {Thinnest {Covering} of the {Euclidean} {Plane} with {Incongruent} {Circles}},
     journal = {Analysis and Geometry in Metric Spaces},
     pages = {40--46},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AGMS_2017_5_1_a1/}
}