KHAN, Arshad; NAYAK, Sucheta; MOHANTY, R. K. OFF-STEP DISCRETIZATION FOR SYSTEM OF NONLINEAR SINGULAR BOUNDARY VALUE PROBLEMS USING VARIABLE MESH. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 39, p. 508–529, 2018. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6888. Acesso em: 26 sep. 2026.