Development strategy of informative footpaths of the Crimea Svetlana Kalinkina, Maria Nikiforova, Valentina Kulik, Natalya Lazitskaya and Irina Tregulova E3S Web Conf., 91 (2019) 05027 Published online: 02 April 2019 DOI: 10.1051/e3sconf/20199105027