@article{Stoyanov_2015 author = {Miroslav Stoyanov and Clayton G. Webster}, title = {A GRADIENT-BASED SAMPLING APPROACH FOR DIMENSION REDUCTION OF PARTIAL DIFFERENTIAL EQUATIONS WITH STOCHASTIC COEFFICIENTS}, journal = {International Journal for Uncertainty Quantification}, issn = {2152-5080}, year = {2015}, volume = {5}, number = {1}, pages = {49--72} }