Chiara Bodei Pierpaolo Degano Han Gao Linda Brodo Detecting and Preventing Type flaws: a Control Flow Analysis with Tags. 3-22 2007 194 Electr. Notes Theor. Comput. Sci. 1 http://dx.doi.org/10.1016/j.entcs.2007.09.010 db/journals/entcs/entcs194.html#BodeiDGB07