@misc{Wuebben2026-beyond-de-prado-and-cotton,
  author = {Bernd Johannes Wuebben},
  title = {{Beyond De Prado and Cotton: Hierarchical and Iterative Methods for General Mean-Variance Portfolios}},
  year = {2026},
  doi = {10.48550/arXiv.2604.23833},
  url = {https://doi.org/10.48550/arXiv.2604.23833},
  note = {Preprint}
}