@article{ELA_2010__20__a1,
     author = {Li, Chi-Kwong and Milligan, Thomas and Trosset, Michael W.},
     title = {Euclidean and {circum-Euclidean} distance matrices: characterizations and linear preservers},
     journal = {The electronic journal of linear algebra},
     pages = {739--752},
     publisher = {mathdoc},
     volume = {20},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2010__20__a1/}
}