Gabriel, Radu, Solomon Maria, Hostiuc Marinela, Bulescu I. Alexandru, and Purcarea Lorin Victor. 2018. “The Efficiency of Marketing Strategies in Health Care - Using Social Vouchers and Coupons”. Global Journal of Business, Economics and Management: Current Issues 8 (3):89-94. https://doi.org/10.18844/gjbem.v8i3.3649.