Undefinability results in o-minimal expansions of the real numbers.

Ricardo Bianconi Undefinability results in o-minimal expansions of the real numbers. 43-51 2005 134 Ann. Pure Appl. Logic 1 http://dx.doi.org/10.1016/j.apal.2004.06.010 db/journals/apal/apal134.html#Bianconi05