Motivation-based cluster analysis of international tourists visiting a World Heritage City: The case of Porto, Portugal A. Ramires F. Brandão A.C. Sousa Publication Journal: Journal of Destination Marketing and Management Year of Publication: 2018 Volume: 8 Pagination: 49-60 Identifiers Other Numbers: 2-s2.0-85008462898 Alternative titles DOIGoogle ScholarBibTeXRIS Locators