| On stability of the general linear equation A Bahyrycz, J Olko Aequationes mathematicae 89, 1461-1474, 2015 | 45 | 2015 |
| Hyperstability of general linear functional equation A Bahyrycz, J Olko Aequationes mathematicae 90, 527-540, 2016 | 30 | 2016 |
| On an equation characterizing multi-additive-quadratic mappings and its Hyers–Ulam stability A Bahyrycz, K Ciepliński, J Olko Applied Mathematics and Computation 265, 448-455, 2015 | 30 | 2015 |
| Selections of an iteration semigroup of linear set-valued functions J Olko aequationes mathematicae 56 (1), 157-168, 1998 | 18 | 1998 |
| On stability and hyperstability of an equation characterizing multi-Cauchy–Jensen mappings A Bahyrycz, J Olko Results in Mathematics 73, 1-18, 2018 | 17 | 2018 |
| On Hyers–Ulam stability of two functional equations in non-Archimedean spaces A Bahyrycz, K Ciepliński, J Olko Journal of Fixed Point Theory and Applications 18, 433-444, 2016 | 17 | 2016 |
| Stability of the equation of (p, q)-Wright functions A Bahyrycz, J Olko Acta Mathematica Hungarica 146, 71-85, 2015 | 13 | 2015 |
| Semigroups of set-valued functions J Olko PUBLICATIONES MATHEMATICAE-DEBRECEN 51 (1-2), 81-96, 1997 | 13 | 1997 |
| On functions that are approximate fixed points almost everywhere and Ulam’s type stability A Bahyrycz, J Brzdęk, E Jabłońska, J Olko Journal of Fixed Point Theory and Applications 17, 659-668, 2015 | 10 | 2015 |
| Hyperstability of some functional equations on restricted domain A Bahyrycz, J Olko Journal of Function Spaces 2017, 2017 | 7 | 2017 |
| Concave iteration semigroups of linear set-valued functions J Olko Annales Polonici Mathematici 71 (1), 31-38, 1999 | 7 | 1999 |
| On indexed families of multifunctions generated by families of functions J Olko Aequationes mathematicae 88, 125-135, 2014 | 3 | 2014 |
| On semigroups with an infinitesimal operator J Olko Annales Polonici Mathematici 85, 77-89, 2005 | 2 | 2005 |
| On approximate roots of polynomials and systems of polynomials in ultrametric Banach algebras J Brzdęk, E Jabłońska, J Olko Journal of Mathematical Analysis and Applications 464 (1), 531-545, 2018 | | 2018 |
| Remarks on microperiodic multifunctions J Olko Bulletin of the Iranian Mathematical Society 42 (2), 447-459, 2016 | | 2016 |
| Inclusions Characterizing Polynomial-Type Multifunctions J Olko Results in Mathematics 68, 331-343, 2015 | | 2015 |
| On representation of multimeasure J Olko Tatra Mountains Mathematical Publications 44 (1), 97-103, 2009 | | 2009 |
| Hyers-Ulam stability of some functional equation J Olko | | |
| Application of the fixed point approach to hyperstability of general linear functional equation A BAHYRYCZ, J OLKO | | |
