  The paper continues our previous work [7] on the radius of subregularity that
was initiated by Asen Dontchev. We extend the results of [7] to general
Banach/Asplund spaces and to other classes of perturbations, and sharpen the
coderivative tools used in the analysis of the robustness of well-posedness of
mathematical problems and related regularity properties of mappings involved in
the statements. We also expand the selection of classes of perturbations, for
which the formula for the radius of strong subregularity is valid.
