TINIANSKIJ, N. On conjugate of saddle-convex functions. Lithuanian Mathematical Journal, [S. l.], v. 8, n. 2, p. 351–370, 1968. DOI: 10.15388/LMJ.1968.20222. Disponível em: https://journals.vu.lt./LMJ/article/view/20222. Acesso em: 26 apr. 2025.