Dalang, Robert C.2008-12-012008-12-012008-12-01199910.1214/EJP.v4-43https://infoscience.epfl.ch/handle/20.500.14299/32026stochastic wave equationstochastic heat equationGaussian noiseprocess solutionExtending martingale measure stochastic integral with applications to spatially homogeneous S. P. D. E'stext::journal::journal article::research article