GOODMAN, G. S.; YORKE, J. A. Misbehaviour of Solutions of the Differential Equation $y’=f(x,y)+\varepsilon$ when the Right Hand Side is Discontinuous. MATHEMATICA SCANDINAVICA, [S. l.], v. 27, p. 72–76, 1970. DOI: 10.7146/math.scand.a-10988. Disponível em: https://www.mscand.dk/article/view/10988. Acesso em: 28 apr. 2024.