@article{journals/iandc/GottlobP01, title = "Working with {ARMs}: Complexity Results on Atomic Representations of Herbrand Models", author = "Georg Gottlob and Reinhard Pichler", year = "2001", journal = "Inf. Comput.", number = "2", pages = "183-207", volume = "165", doi = "10.1006/inco.2000.2915", }