Mogens Nielsen Branislav Rovan Introduction - Combined TCSA/TCSB issue - mathematical foundations of computer science 2000. 457-458 2005 340 Theor. Comput. Sci. 3 http://dx.doi.org/10.1016/j.tcs.2005.03.010 db/journals/tcs/tcs340.html#NielsenR05