STEFANOV, Tsanko. RESEARCH ON THE MACRO ELEMENTS OF THE MARKETING ENVIRONMENT OF COMPANIES BY INDUSTRY. Proceedings of the International Conference on Secure Systems Design and Technology Development, [S. l.], v. 1, p. 467–472, 2026. DOI: 10.68302/std2026.vol1.43. Disponível em: https://journal.etrconf.eu/std/article/view/43. Acesso em: 29 sep. 2026.