Stability criteria for two-variable polynomials
Dragoslav D. Šiljak · IEEE Transactions on Circuits and Systems · 1975
Recursive algebraic algorithms are developed for testing various stability properties of two-variable polynomials in a finite number of steps. Stability is tested with respect to either the half-plane or the unit circle applying only two times the equivalent of the Routh or Marden test, regardless of the degree of the polynomial.