| 2011-09 | A functional equation related to inner product spaces in non-Archimedean normed spaces | 박춘길 |
| 2013-11 | Functional equations and inequalities in matrix paranormed spaces | 박춘길 |
| 2013-04 | Functional equations and inequalities in paranormed spaces | 박춘길 |
| 2011-03 | Functional equations in Banach modules and approximate algebra homomorphisms in Banach algebras | 박춘길 |
| 2015-08 | Functional equations in matrix normed spaces | 박춘길 |
| 2012-03 | Functional equations in orthogonality spaces | 박춘길 |
| 2012-07 | Functional equations in paranormed spaces | 박춘길 |
| 2014-01 | FUNCTIONAL INEQUALITIES ASSOCIATED WITH BI-CAUCHY ADDITIVE FUNCTIONAL EQUATIONS | 박춘길 |
| 2015-06 | FUNCTIONAL INEQUALITIES ASSOCIATED WITH INNER PRODUCT PRESERVING MAPPINGS | 박춘길 |
| 2019-03 | Functional inequalities in matrix Banach spaces | 박춘길 |
| 2015-03 | Functional inequalities in non-Archimedean normed spaces | 박춘길 |
| 2013-05 | Functional inequalities in paranormed spaces | 박춘길 |
| 2015-07 | Fundamental stabilities of an alternative quadratic reciprocal functional equation in non-Archimedean fields | 박춘길 |
| 2016-10 | Fundamental stabilities of the nonic functional equation in intuitionistic fuzzy normed spaces | 박춘길 |
| 2011-11 | Fuzzy *-homomorphisms and fuzzy *-derivations in induced fuzzy C*-algebras | 박춘길 |
| 2015-11 | FUZZY APPROXIMATE OF DERIVATIONS | 박춘길 |
| 2012-06 | Fuzzy approximate of homomorphisms | 박춘길 |
| 2011-02 | FUZZY FUNCTIONAL INEQUALITIES | 박춘길 |
| 2019-03 | Fuzzy Hyers-Ulam stability for generalized additive functional equations | 박춘길 |
| 2012-04 | Fuzzy n-Jordan *-homomorphisms in induced fuzzy C*-algebras | 박춘길 |
