Abstract
In a recent article [1] Sekine presents some interesting aspects of the problems of work functions in electron spectroscopy, and, in particular, for XPS. In his "Summary of the Issue" he defines work function and since that definition is essentially the same as my understanding of the term I, have attempted some discussion of his two question points below. Furthermore, I have added a third point which seems to me to be related. Some interesting comments have already been supplied by Ichimura [2]. For the benefit of English readers the question points are shown in bold below.
https://ror.org/015w2mp89 
