@article{Trzcińska:2001,
  author  = "A. Trzcińska and J. Jastrzębski and P. Lubiński and F. Hartmann and R. Schmidt and T. von Egidy and B. Kłos",
  title   = "Neutron density distributions deduced from antiprotonic atoms",
  journal = "Physical Review Letters",
  volume  = "Vol. 87",
  number  = "no. 8",
  pages   = "[4]",
  year    = "2001",
}