G. N. PATHAN; P. H. BHATHAWALA. A Mathematical Model for Unemployment Control-An Analysis with and without Delay. International Journal of Mathematics And its Applications, [S. l.], v. 6, n. 1 - A, p. 83–93, 2018. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/900. Acesso em: 17 may. 2024.