The title is pretty much the question : the acclaimed mathematician Jean Bourgain recently passed away, there is a tribute on the blog of Terry Tao.
Apparently, most of his papers are deep and technical, but :
what are some of his most accessible ones, say in the broad area of real analysis/functional analysis (after following an advanced course like Brezis' book) ?
[edit:] or indeed in any other area, if it is more suitable.
Many thanks!