Hotel Classification Systems: Recurrence of criteria in 4 and 5 stars hotels. / World Tourism Organization (UNWTO)
COTA(S): 16335-Dg
New platform services (or the so-called sharing economy) : Understand, rethink and adapt
COTA(S): 17334
Future Challenges for Cultural Tourism : Saint Petersburg, Russian Federation, 5 October 2002
COTA(S): 17778