Some remarks on extraresolvable spaces

We give an example of a countable extraresolvable space that is not strongly extraresolvable. We also prove that Q×ω1 is strongly extraresolvable, and if X is strongly extraresolvable and nwd(X)=Δ(X)=ω, then X×ω is strongly extraresolvable (ω1 and ω are equipped with the discrete topology).