Alberto de la Encina Luis Llana Fernando Rubio Mercedes Hidalgo-Herrero Observing intermediate structures in a parallel lazy functional language. 109-120 2007 conf/ppdp/2007 PPDP http://doi.acm.org/10.1145/1273920.1273935 db/conf/ppdp/ppdp2007.html#EncinaLRH07