Carneiro, C. A. S., & Tañski , N. C. (2012). Marketing relationship and trading in the relationship between service providers, health operators and final customer: the search for an integrating model. Scientific Journal Visión De Futuro, 16(2). Retrieved from https://visiondefuturo.fce.unam.edu.ar/index.php/visiondefuturo/article/view/666