A Girard, CE Rasmussen, R Murray-Smith. Gaussian process priors with uncertain inputs: Multiple-step ahead prediction. Technical Report TR-2002-119, Department of Computing Science, University of Glasgow, October, 2002. A Girard, R Murray-Smith. Learning a Gaussian process model with uncertain inputs. Technical Report TR-2003-144, Department of Computing Science, University of Glasgow, June, 2003. Approximate methods for propagation of uncertainty with gaussian process models. Approximate methods for propagation of uncertainty with gaussian process models. PhD thesis, 2004. S. ukaszyk. A new concept of probability metric and its applications in approximation of scattered data sets. Computational Mechanics 2004.