1. From Thermalism to Health Tourism;Becheri;Revue de Tourisme,1989
2. Cockerell, Nancy (1996), "Market segments - Spas and health resorts in Europe", Travel and Tounsm Analyst, No. 1,53-77.
3. Poon, Auliana (1993), "The New Tourism Revolution", European Travel Monitor, World Travel Teview 1992, Luxemburg 1993, 172-183.
4. Strategic Tourism Marketing Plan of CEI Countries (1996), CENTRAL EUROPEAN INITATIVE, The Working Group for Tourism. Zagreb.
5. Vadas, Vera and Robert Vajda (1989), "Marketing Activity in Spa Tourism", Vol. 30, Editions AIEST 1989, St.Gall (Suisse), 151-161.