@article{10_4064_ap89_1_2,
     author = {Adam Bobrowski and Ma/lgorzata Kubali/nska},
     title = {On a functional equation with derivative and symmetrization},
     journal = {Annales Polonici Mathematici},
     pages = {13--24},
     publisher = {mathdoc},
     volume = {89},
     number = {1},
     year = {2006},
     doi = {10.4064/ap89-1-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap89-1-2/}
}