Summary: We show the results in D. N. Chalishajar
[J. Franklin Inst. 344, No. 1, 12–21 (2007; Zbl 1119.93016
)] and Y.-K. Chang
and D. N. Chalishajar
[Controllability of mixed Volterra-Fredholm type integro-differential systems in Banach spaces, J. Franklin Inst. 345, 499–507 (2008), doi:10.1016/j.jfranklin.2008.02.002] are only valid for ordinary differential control systems. As a result the examples provided cannot be recovered as applications of the abstract results.