Laurent Braud. Covering of ordinals. In Ravi Kannan, K. Narayan Kumar, editors, IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science, FSTTCS 2009, December 15-17, 2009, IIT Kanpur, India. Volume 4 of LIPIcs, pages 97-108, Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, 2009. [doi]
Abstract is missing.