@inproceedings{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",
  booktitle = "Proceedings of XXI International Baldin Seminar on High Energy Physics Problems  {\textemdash} PoS(Baldin ISHEPP XXI)",
  year = 2013,
  volume = "173",
  pages = "099"
}