Study on the degree of use and knowledge of digital marketing elements in Romanian small and medium enterprisesRăzvan Mihai Dobrescu, Cristina Petronela Simion, Iuliana Grecu and Cristian Aurelian PopescuMATEC Web Conf., 184 (2018) 04017DOI: https://doi.org/10.1051/matecconf/201818404017