@article{Saxena_2008 author = {Parul Saxena and A. C. Srivastava}, title = {Rotation of a Solid Sphere in a Viscous Fluid Bounded by a Concentric Spherical Porous Medium}, journal = {Journal of Porous Media}, issn = {1091-028X}, year = {2008}, volume = {11}, number = {6}, pages = {575--588} }