@article{Maron:2008,
  author  = "N. Maron and O. Maron",
  title   = "Criteria for mixing rules application for inhomogeneous astrophysical grains",
  journal = "Monthly Notices of the Royal Astronomical Society",
  volume  = "Vol. 391",
  number  = "iss. 2",
  pages   = "738--764",
  year    = "2008",
}