@article{01404384, title = {On convolution type functional equations.}, journal = {Mathematica Pannonica}, volume = {10}, year = {1999}, pages = {271-275}, zbl = {0936.39011}, language = {en}, url = {http://dml.mathdoc.fr/item/01404384} }
Székelyhidi, László. On convolution type functional equations.. Mathematica Pannonica, Tome 10 (1999) pp. 271-275. http://gdmltest.u-ga.fr/item/01404384/