On the matrix equation XH=HX and the associated controllability problem. - Mohamed A. Ramadan; Ehab A. El-Sayed (Appl. Math. Comput., 2007)

Partial eigenvalue assignment problem of high order control systems using orthogonality relations. - Mohamed A. Ramadan; Ehab A. El-Sayed (Comput. Math. Appl., 2010)