Coupled Fixed Points for Hardy-Rogers Type of Maps and Their Applications in the Investigations of Market Equilibrium in Duopoly Markets for Non-Differentiable, Nonlinear Response Functions. - Stanimir Kabaivanov; Vasil Zhelinski; Boyan Zlatanov (Symmetry, 2022)

Best Proximity Points for p-Cyclic Infimum Summing Contractions. - Miroslav Hristov; Atanas Ilchev; Petar Kopanov; Vasil Zhelinski; Boyan Zlatanov (Axioms, 2023)