On some extensions of the projective hierarchy. - Carlos A. Di Prisco; Jimena Llopis (Ann. Pure Appl. Log., 1987)

Sound and Efficient Non-monotonic Inference. - Hector Geffner; Jimena Llopis; Gisela Mendez (IJCAI, 1995)

Borel Partitions of Products of Finite Sets and the Ackermann Function. - Carlos A. Di Prisco; Jimena Llopis; Stevo Todorcevic (J. Comb. Theory A, 2001)

Parametrized Partitions of Products of Finite Sets. - Carlos A. Di Prisco; Jimena Llopis; Stevo Todorcevic (Comb., 2004)