NIRANJAN, K. M.; NAGARAJA, P.; V, L. Semi-Image Neighborhood Block Graphs with Crossing Numbers. Journal of Scientific Research, [S. l.], v. 5, n. 2, p. 295–299, 2013. DOI: 10.3329/jsr.v5i2.11019. Disponível em: https://banglajol.info/index.php/JSR/article/view/11019. Acesso em: 27 jul. 2024.