DHUNGANA, B. P. Contraction Mapping Principle Approach to Differential Equations. Nepal Journal of Science and Technology, [S. l.], v. 10, p. 149–153, 2010. DOI: 10.3126/njst.v10i0.2950. Disponível em: https://www.nepjol.info/index.php/NJST/article/view/2950. Acesso em: 29 apr. 2024.