PAOLINI, E. Minimal connections: the classical Steiner problem and generalizations. Bruno Pini Mathematical Analysis Seminar, [S. l.], v. 3, n. 1, p. 72–87, 2012. DOI: 10.6092/issn.2240-2829/3421. Disponível em: https://mathematicalanalysis.unibo.it/article/view/3421. Acesso em: 19 apr. 2024.