1. Steady-state output insensivity to step-wise disturbances and parameter variations;Grasselli;Univ. di Roma,Ist. di Automatica,1974
2. Insensivity by linear feedback;Fronza;Journal of the Franklin Institute,1973
3. Trajektory insensitivity via feedback;Karlin;Automatica,1974
4. Parametric insensivity and controlled invariance;Bonivento;Automatica,1975
5. Further results on trajektory insensivity;Locatelli;Automatica,1976