@article{Cyganiuk:2009,
  author  = "J. Cyganiuk and P. Kuryło and E. Tertel",
  title   = "The influence of an effective friction angle on the velocity of material of group III, leaving the impact plate",
  journal = "International Journal of Applied Mechanics and Engineering",
  volume  = "Vol. 14",
  number  = "no 4",
  pages   = "929--939",
  year    = "2009",
}