Peculiarities of formation and perspectives of development of the world market of the cruise industryNatalya Logunova, Svetlana Kalinkina, Valentina Kulik, Natalya Lazitskaya and Irina TregulovaE3S Web Conf., 91 (2019) 08055DOI: https://doi.org/10.1051/e3sconf/20199108055