Gianluigi Pillonetto Francesco Dinuzzo Giuseppe De Nicolao Bayesian Online Multitask Learning of Gaussian Processes. 193-205 2010 32 IEEE Trans. Pattern Anal. Mach. Intell. 2 http://doi.ieeecomputersociety.org/10.1109/TPAMI.2008.297 db/journals/pami/pami32.html#PillonettoDN10