@TechReport{FGKT13, author = "Stephen Fenner and Rohit Gurjar and Arpita Korwar and Thomas Thierauf", title = "On Two-level Poset Games ", institution = "Electronic Colloquium on Computational Complexity", address = "http://eccc.hpi-web.de/eccc/", year = "2013", number = "TR13-019", }