State elimination and identifiability of the delay parameter for nonlinear time-delay systems. - Milena Anguelova; Bernt Wennberg (Autom., 2008)

On analytic and algebraic observability of nonlinear delay systems. - Milena Anguelova; Bernt Wennberg (Autom., 2010)

When retarded nonlinear time-delay systems admit an input-output representation of neutral type. - Miroslav Halás; Milena Anguelova (Autom., 2013)