OHSUGI, Hidefumi; HIBI, Takayuki. Prestable ideals and Sagbi bases. Mathematica Scandinavica, Berkeley, CA, United States, v. 96, n. 1, p. 22–30, 2005. DOI: 10.7146/math.scand.a-14942. Disponível em: https://journals.msp.org/mscand/article/view/755. Acesso em: 24 jul. 2026.