Lamarca, Kátia Pinheiro, et al. “Relationship Marketing: An Analysis of Relationship Business-To-Business at Multi Brand Retailers From Surfwear”. Future Studies Research Journal: Trends and Strategies, vol. 6, no. 1, June 2014, pp. 111-3, doi:10.24023/FutureJournal/2175-5825/2014.v6i1.160.