MOLNÁR, E.; SZIRMAI, J. Generalized polygonal Wankel engines. Periodica Polytechnica Transportation Engineering, [S. l.], v. 37, n. 1-2, p. 29–32, 2009. 10.3311/pp.tr.2009-1-2.05. Disponível em: https://pp.bme.hu/tr/article/view/1856. Acesso em: 8 feb. 2023.