FARKAS, Bálint; SZILÁRD GY., Révész. Tiles with no spectra in dimension 4. Mathematica Scandinavica, Berkeley, CA, United States, v. 98, n. 1, p. 44–52, 2006. DOI: 10.7146/math.scand.a-14982. Disponível em: https://journals.msp.org/mscand/article/view/715. Acesso em: 24 jul. 2026.