KÖHLER, Günter. Some eta-identities arising from theta series. MATHEMATICA SCANDINAVICA, [S. l.], v. 66, p. 147–154, 1990. DOI: 10.7146/math.scand.a-12299. Disponível em: https://tidsskrift.dk/math/article/view/12299. Acesso em: 13 aug. 2026.