@article{GDZPPN002313189, title = {A Partial Solution of the Pompeiu Problem.}, journal = {Mathematische Annalen}, volume = {219}, year = {1976}, pages = {183-190}, zbl = {0329.35045}, url = {http://dml.mathdoc.fr/item/GDZPPN002313189} }
Williams, Stephen A. A Partial Solution of the Pompeiu Problem.. Mathematische Annalen, Tome 219 (1976) pp. 183-190. http://gdmltest.u-ga.fr/item/GDZPPN002313189/