KAIJSER, S. A New Proof of the Fundamental Lemma of Interpolation Theory. Mathematica Scandinavica, Berkeley, CA, United States, v. 78, p. 266–270, 1996. DOI: 10.7146/math.scand.a-12588. Disponível em: https://journals.msp.org/mscand/article/view/1045. Acesso em: 25 jul. 2026.