1. Properties of some norm related functions of unbounded linear operators;Cross;Math. Z.,1988
2. Some continuity properties of linear transformations in normed spaces;Cross;Glasgow Math. J.,1988
3. Unbounded linear transformations of the upper semi-Fredholm type in normed spaces;Cross;Portugal. Math.,1990
4. Unbounded strictly singular operators;Cross;Indag. Math. = Proc. Konink. Ned. Akad. Weten. (Series A),1988
5. R. W. Cross L. E. Labuschagne Quaestiones Math.