Escobar–Callejas, Carlos Mario, José Rodrigo González–Granada, and Abel Enrique Posso Agudelo. “Local Atractivity in Zip Bifurcation”. Ingeniería y Ciencia 6, no. 12 (December 1, 2010): 11–41. Accessed October 31, 2024. https://publicaciones.eafit.edu.co/index.php/ingciencia/article/view/326.