On the robust stability and robust control via reflections coefficients [Electronic resource]Nurges, Ülo; Rüstern, EnnuProceedings of the First African Control Conference : University of Cape Town, Cape Town, South Africa, 3-5 December 20032003 / p. 381-386 [CD-ROM] https://folk.ntnu.no/skoge/prost/proceedings/afcon03/Papers/003.pdf