Consumos energéticos em hotéis / Miguel Agostinho
Metodologia da avaliação ex-ante de projectos turísticos com impactes ambientais : Relatório final 2002 e Nota explicativa / João Albino Silva, Fernando Perna, Maria João Custódio, Célia Ramos
Practical environmental policies in travel and tourism-part I : the hotel sector / Victor T.C. Middleton, Rebecca Hawkins
The function and significance of tourism in today's society. Issues and challenges provoked by the constraints of energy supply / J. Jafari