1. Coastal scenery: An introduction;Rangel-Buitrago,2019
2. UNWTO world tourism barometer and statistical annex, May 2019;UNWTO World Tour. Barom.,2019
3. UNWTO world tourism barometer and statistical annex, Jan 2020;UNWTO World Tour. Barom.,2020
4. Tourism-generated earnings in the coastal zone: A regional analysis;Klein;J. Coast. Res.,2004