@Article{ PINTO_GÁLVEZ:365-380,

author = { MARÍA PINTO and CARMEN GÁLVEZ MARTÍNEZ } ,

title = { PARADIGMS FOR ABSTRACTING SYSTEMS },

journal = { JOURNAL OF INFORMATION SCIENCE },

year = { 1999 },

volume = { 25 },

issn = { 0165-5515 },

pages = { 365-380 },

}