"

 Mihlin/Mikhlin 

Suits me fine.  It makes sense for the transliteration to match that of his Wikipedia biography page.  Thanks for the heads-up, nonetheless. -) (By the way, not that it matters, but I think that as well as Stein, Grafakos uses the ""Mihlin"" transliteration in his books, though I don't have my copy to hand to check...)   "