Faessler, Katrin, and Risto Hovila. “Improved Hausdorff Dimension Estimate for Vertical Projections in the Heisenberg Group”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 15, no. special (February 25, 2016): 459-483. Accessed May 26, 2026. https://journals-dev.sns.it/index.php/annaliscienze/article/view/429.