GULLIKSEN, Tor H. On the Hilbert series of the homology of differential gaded algebras. Mathematica Scandinavica, Berkeley, CA, United States, v. 46, p. 15–22, 1980. DOI: 10.7146/math.scand.a-11848. Disponível em: https://journals.msp.org/mscand/article/view/1799. Acesso em: 25 jul. 2026.