Romão, João, Peter Nijkamp, Eveline van Leeuwen, and Bart Neuts. 2012. “URBAN TOURIST COMPLEXES AS MULTI-PRODUCT COMPANIES: MARKET SEGMENTATION AND PRODUCT DIFFERENTIATION IN AMSTERDAM”. Tourism & Management Studies, January, 1092-94. https://www.tmstudies.net/index.php/ectms/article/view/301.