@article{MSC_1996_1996_1_a33,
     author = {Sobrino, Alejandro and Olivas, Jose Angel},
     title = {Gram\'aticas de estructura de fase para expresar conceptos imprecisos en espa\~nol.},
     journal = {Mathware & soft computing},
     pages = {395-402},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MSC_1996_1996_1_a33/}
}