Goetgheluck, P. “’’Bonnes’’ Et ’’mauvaises’’ Fonctions-Poids: "Good" and ‘bad’ Weight Functions”.
Anal. Numér. Théor. Approx. 8, no. 2 (August 1, 1979): 169–175. Accessed April 11, 2025.
https://ictp.acad.ro/jnaat/journal/article/view/1979-vol8-no2-art6.