@Article{Chudziak2011, author = "Chudziak, MaƂgorzata", title = "Stability of the Popoviciu type functional equations on groups", journal = "Opuscula Math.", year = "2011", volume = "31", number = "3", pages = "317--325", doi = "http://dx.doi.org/10.7494/OpMath.2011.31.3.317", url = "http://dx.doi.org/10.7494/OpMath.2011.31.3.317", abstract = "We consider the stability problem for a class of functional equations related to the Popoviciu equation.", keywords = "stability, Popoviciu equation, quadratic equation, additive function", issn = "1232-9274" }