@unpublished{FladHarutyunyanGriebel2026,
  author = {Flad, Heinz-Jürgen and Flad-Harutyunyan, Gohar and Griebel, Michael},
  title = {Higher Order Singularities in Configuration Space. {I}. {Q}uantum Many-Particle {C}oulomb Systems},
  annote = {article, inspreprint},
  note = {Available as INS Preprint No. 2601},
  inspreprintnum = {2601},
  year = {2026}
}