@incollection{73733,
author = {Jiawang Nie and Pablo A. Parrilo and Bernd Sturmfels},
title = {{Semidefinite representation of the ${k}$-ellipse}},
series = {The IMA volumes in mathematics and its applications},
volume = {146},
doi = {10.1007/978-0-387-75155-9\_7},
booktitle = {Algorithms in algebraic geometry},
editor = {Alicia Dickenstein and Frank-Olaf Schreyer and Andrew J. Sommese},
publisher = {Springer},
address = {New York},
year = {2008},
pages = {117--132},isbn={978-0-387-75154-2},
}