Michael G. Burke Igor Peshansky Mukund Raghavachari Christoph Reichenbach Analysis of Imperative XML Programs. 216-230 2007 conf/dbpl/2007 DBPL http://dx.doi.org/10.1007/978-3-540-75987-4_15 db/conf/dbpl/dbpl2007.html#BurkePRR07