| Identifer | oai:union.ndltd.org:DITED/urn:dited:bn:29222 |
| Date | January 1999 |
| Creators | Mota, Jorge Manuel Guedes Silva |
| Contributors | Ribeiro, José Silva |
| Publisher | Instituições portuguesas -- -Universidade Aberta |
| Source Sets | National Library of Portugal DiTeD ETD Repository |
| Language | Portuguese |
| Detected Language | Portuguese |
| Type | mastersthesis |
| Source | Porto |
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