What Willem Buiter has written on eliminating the zero lower bound is not always the easiest reading. So Joe Weisenthal’s May 9, 2012 summary linked above is useful. 

For more links on Willem Buiter and others who played a role in the eventual end of the zero lower bound, see the section on History of Thought and Economics History in my bibliographic post “How and Why to Eliminate the Zero Lower Bound: A Reader’s Guide.

Thanks to Ellie Kesselman, for the trail that lead me to Joe's Business Insider article.