Yang, Yong. Agglomeration density and tourism development in China / Yong Yang. - 2012. // Tourism management : research - policies - practice. Vol. 33 (2012), No. 6
Yang, Yong. Market potential, industrial density and revenue of tourism firms in China / Yong Yang. - 2014. // Tourism economics : the business and finance of tourism and recreation. Vol. 20 (2014), No. 6
Početak