Design and Analysis of a Combined 4-Point Ternary Refinement Scheme with C4-Smoothness. Punjab University Journal of Mathematics, [S. l.], v. 57, n. 7, p. 706–726, 2025. DOI: 10.52280/aak6kz55. Disponível em: https://pujm.pu.edu.pk/index.php/pujm/article/view/616. Acesso em: 2 sep. 2026.