@unpublished{Espigule2026PlanarSimilarities,
  author = {Espigul{\'e}, Bernat},
  title = {Connectedness Loci for Pairs of Planar Similarities},
  year = {2026},
  note = {Manuscript in preparation; provisional title},
  url = {https://complextrees.com/4D/publication/#flagship}
}

@unpublished{Espigule2026ContactFamilies,
  author = {Espigul{\'e}, Bernat},
  title = {Connectedness Loci for Pairs of Planar Similarities: Contact Families, Sections and Landmarks},
  year = {2026},
  note = {Research companion in preparation; provisional title},
  url = {https://complextrees.com/4D/publication/#companion}
}

@misc{Espigule2026BMDPoster,
  author = {Espigul{\'e}, Bernat},
  title = {Four-Dimensional Mandelbrot Sets for Binary Self-Similar Sets of the Plane},
  year = {2026},
  note = {Poster for Barcelona Mathematical Days 2026; submitted 27 September 2026},
  url = {https://complextrees.com/4D/publication/poster.pdf}
}