Comment on ‘‘Monopole strength and shape coexistence in the A≃100 mass region’’

It is pointed out that even the new measurements relating to half-lives for $0_2^{+}$ excited states in the N=60 Zr and Mo nuclei are in line with the idea of strong-mixing between almost spherical and well deformed quadrupole shapes as the cause of large E0 matrix elements. Moreover, it is shown that similar arguments of important mixing also hold in the nuclear shell-model.