NYKYFORCHYN, Iryna. Model of Non-Linear Pricing with Lower Constraints on Buyers’ Utilities. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, [S. l.], n. 22(83), p. 112–124, 2026. DOI: 10.31471/2304-7399-2026-22(83)-112-124. Disponível em: https://pvntsh.nung.edu.ua/index.php/number/article/view/2238. Acesso em: 25 apr. 2026.