Correccion grammatical y preprocesamiento

@article{pub3411,
    author = {

Bustamante, Flora Ramírez
 and 

Leon, Fernando Sánchez
 and 

Declerck, Thierry
},
    title = {Correccion grammatical y preprocesamiento},
    booktitle = {Lenguaje Natural, Revista numero 21, July},
    year = {1997},
    volume = {Revista numero 21, July},
    journal = {Procesamiento del Lenguaje Natural (SEPLN)}
}