RACK, Heinz-Joachim; VAJDA, Robert. Optimal cubic Lagrange interpolation: Extremal node systems with minimal Lebesgue constant. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 60, n. 2, p. 151–171, 2015. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/5710. Acesso em: 5 feb. 2025.