FOISY, Joel; JACOBS, Catherine; PAQUIN, Trinity; SCHALIZKI, Morgan; STRINGER, Henry. A Proof Using Böhme’s Lemma That no Petersen Family Graph has a Flat Embedding. The PUMP Journal of Undergraduate Research, [S. l.], v. 7, p. 323–332, 2024. DOI: 10.46787/pump.v7i0.3674. Disponível em: https://journals.calstate.edu/pump/article/view/3674. Acesso em: 2 jan. 2025.