Stable and real-zero polynomials in two variables. - Anatolii Grinshpan; Dmitry S. Kaliuzhnyi-Verbovetskyi; Victor Vinnikov; Hugo J. Woerdeman (Multidimens. Syst. Signal Process., 2016)

A Linear-algebraic Proof of Hilbert's Ternary Quartic Theorem. - Anatolii Grinshpan; Hugo J. Woerdeman (Am. Math. Mon., 2019)