Tzafestas SG, Tzamtzi MP. An alternative relaxed sufficient condition for the robust stability of uncertain matrices. In: Symposium on control, optimization and supervision (Lille, July 9-12, 1996). ; 1996. pp. 1274–1277.

Tzafestas SG, Tzamtzi MP, Rigatos GG. Robust control and motion design for mobile robots in a time-varying environment. In: CESA'96 IMACS Multiconference: computational engineering in systems applications. ; 1996. pp. 706–711.

Tzafestas SG, Tzamtzi MP. An alternative relaxed sufficient condition for the robust stability of uncertain matrices. In: CESA'96 IMACS Multiconference: computational engineering in systems applications. ; 1996. pp. 1274–1277.