By Costa João L   Girão Pedro M   Natário José   Costa João L   in Classical and Quantum Gravity

ISSN:0264-9381|32|1|15017-15049

IOP Publishing‎(2015)‎

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By Carlos Costa João   López Lourdes   Taberner José   in Cultura y Educación

ISSN:1578-4118|12|1-2|181-187

Fundación Infancia y Aprendizaje‎(2000)‎

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