@Article{ Pinto-Molina_GÁLVEZ:365-380,

author = { María Pinto-Molina and CARMEN GÁLVEZ MARTÍNEZ } ,

title = { PARADIGMS FOR ABSTRACTING SYSTEMS },

journal = { Journal of Information Science },

year = { 1999 },

volume = { 25 },

pages = { 365-380 },

}