Alexander Rabinovich Amit Shomrat Selection and Uniformization Problems in the Monadic Theory of Ordinals: A Survey. 571-588 2008 conf/birthday/2008trakhtenbrot Pillars of Computer Science http://dx.doi.org/10.1007/978-3-540-78127-1_31 db/conf/birthday/trakhtenbrot2008.html#RabinovichS08