@phdthesis{Gathungu2018,
  author      = {Duncan Kioi Gathungu},
  title       = {On Multigrid and H-Matrix Methods for Partial Integro-Differential Equations},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year        = {2018},
}