1. When is there a representer theorem? Vector versus matrix regularizers;Argyriou;J. Mach. Learn. Res.,2009
2. Theory of reproducing kernels;Aronszajn;Trans. Amer. Math. Soc.,1950
3. Banach and Hilbert Spaces of Vector-valued Functions, Pitman Research Notes in Mathematics 90;Burbea,1984
4. Universal multi-task kernels;Caponnetto;J. Mach. Learn. Res.,2008
5. Vector valued reproducing kernel Hilbert spaces of integrable functions and Mercer theorem;Carmeli;Anal. Appl.,2006