1.
Cetlová H, Marciník R, Velinov E. Research into online marketing activities and tools for measuring their efficiency by entrepreneurs in the czech republic. SEHS [Internet]. 2020 Nov. 1 [cited 2024 Jul. 27];11(1):41-54. Available from: http://sehs.ambis.cz/index.php/sehs/article/view/47