@article{Ivashchenko:2013Er,
  author = "Ivashchenko, Ganna  and  Sergijenko, Olga  and  Torbaniuk, Olena",
  title = "{Improved technique for quasar composite spectra  generation}",
  doi = "10.22323/1.148.0007",
  journal = "PoS",
  year = 2013,
  volume = "ENAS 6",
  pages = "007"
}