@inproceedings{DinuzzoS2012, title = {The representer theorem for Hilbert spaces: a necessary and sufficient condition}, author = {Dinuzzo, F. and Sch{\"o}lkopf, B.}, booktitle = {Advances in Neural Information Processing Systems 25}, pages = {189--196}, editors = {P Bartlett, FCN Pereira, CJC. Burges, L Bottou, and KQ Weinberger}, publisher = {Curran Associates Inc.}, year = {2012}, doi = {} }