THEORETICAL APPROACHES TO DETERMINING THE ESSENCE OF MARKETING OF EDUCATIONAL SERVICES OF HIGHER EDUCATION INSTITUTIONS Authors Yu. Shypulina https://orcid.org/0000-0002-8133-578X А. Semeniutin https://orcid.org/0009-0002-4476-0362 DOI: https://doi.org/10.32702/2307-2105.2026.4.39 Downloads pdf (Українська) Published 2026-04-23 Issue No. 4 (2026): Efektyvna ekonomika Section Статті