The use of digital learning tools in the teachers’ professional activities to ensure sustainable development and democratization of education in European countriesOksana Ovcharuk, Iryna Ivaniuk, Nataliia Soroko, Olena Gritsenchuk and Oksana KravchynaE3S Web Conf., 166 (2020) 10019DOI: https://doi.org/10.1051/e3sconf/202016610019