@Article{ParamáGabía06,
author = {Paramá, J. R. and Brisaboa, N. R. and Penabad, M. R. and Places, A. S.},
title = {A semantic approach to optimize linear datalog programs},
journal = {Acta Informatica},
address = {Berlín},
year = {2006},
pages = {341-370}
}