YANAGAWA, Kohji. Linearity defect and regularity over a Koszul algebra. Mathematica Scandinavica, Berkeley, CA, United States, v. 104, n. 2, p. 205–220, 2009. DOI: 10.7146/math.scand.a-15095. Disponível em: https://journals.msp.org/mscand/article/view/602. Acesso em: 24 jul. 2026.