Controllability of matrix second order systems: a trigonometric matrix approach. Sharma, Jaita Pankaj; George, Raju K. — 2007 Electronic Journal of Differential Equations (EJDE) [electronic only]
Controllability of Urysohn integral inclusions of Volterra type. Angell, Thomas S.; George, Raju K.; Sharma, Jaita Pankaj — 2010 Electronic Journal of Differential Equations (EJDE) [electronic only]