BÖHÖNYEY, János. Combigraphs. Periodica Polytechnica Architecture, [S. l.], v. 40, n. 2, p. 47–53, 2009. 10.3311/pp.ar.2009-2.01. Disponível em: https://pp.bme.hu/ar/article/view/20. Acesso em: 19 apr. 2024.