@article{Maron:2005,
  author  = "N. Maron and O. Maron",
  title   = "On the mixing rules for astrophysical inhomogeneous grains",
  journal = "Monthly Notices of the Royal Astronomical Society",
  volume  = "Vol. 357",
  number  = "no 3",
  pages   = "873--880",
  year    = "2005",
}