@article{CSIS_2011_8_3_a5,
     author = {Miguel A. Laguna and Jose M. Marques and Guillermo Rodr{\i}guez-Cano},
     title = {Feature {Diagram} {Formalization} {Based} on {Directed} {Hypergraphs}},
     journal = {Computer Science and Information Systems},
     publisher = {mathdoc},
     volume = {8},
     number = {3},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/CSIS_2011_8_3_a5/}
}