Approximative covariance interpolation with a quadratic penalty. - Per Enqvist; Enrico Avventi (CDC, 2007)

Divergence-based spectral approximation with degree constraint as a concave optimization problem. - Enrico Avventi (CDC, 2008)

ARMA Identification of Graphical Models. - Enrico Avventi; Anders Lindquist; Bo Wahlberg (IEEE Trans. Autom. Control., 2013)