Framework for a Hospitality Big Data Warehouse: The Implementation of an Efficient Hospitality Business Intelligence System. - Célia Maria Quitério Ramos; Daniel Jorge Martins; Francisco Serra; Roberto Lam; Pedro J. S. Cardoso; Marisol B. Correia; João M. F. Rodrigues (Int. J. Inf. Syst. Serv. Sect., 2017)