@article{Ivanov:2013kh,
  author = "Ivanov, Nikolay",
  title = "{Perturbative stability of the QCD predictions for the ratio R=F_L/F_T and azimuthal asymmetry in heavy-quark leptoproduction}",
  doi = "10.22323/1.173.0099",
  journal = "PoS",
  year = 2013,
  volume = "Baldin ISHEPP XXI",
  pages = "099"
}