@article{BMMS_2012_35_3_a4,
     author = {Tian Zhou Xu and John Michael Rassias and Wan Xin Xu},
     title = {A {Generalized} {Mixed} {Quadratic-Quartic} {Functional} {Equation}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2012},
     volume = {35},
     number = {3},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2012_35_3_a4/}
}