Zachary Dodds Christine Alvarado Geoff Kuenning Ran Libeskind-Hadas Breadth-first CS 1 for scientists. 23-27 2007 conf/iticse/2007 ITiCSE http://doi.acm.org/10.1145/1268784.1268794 db/conf/iticse/iticse2007.html#DoddsAKL07