@inbook{ SAMOS:826-835,

author = { JOSE SAMOS JIMENEZ } ,

title = { CLOSED EXTERNAL SCHEMAS IN OBJECT-ORIENTED DATABASES },

booktitle = { DATABASE AND EXPERT SYSTEMS APPLICATIONS },

isbn = { 3-540-42527-6 },

publisher = { SPRINGER-VERLAG },

pages = { 826 - 835 },

year = { 2001 },

}