@unpublished{Oswald.2020.1,
  author = {Peter Oswald},
  title = {Multivariate {H}aar systems in {B}esov function spaces},
  annote = {article, inspreprint},
  note = {Submitted to Mat. Sbornik. Available as INS Preprint No. 2002},
  inspreprintnum = {2002},
  year = {2020}
}