«Obtaining the membership function by using the neural network in Istanbul stock exchange to find the relation between the low and closing prices», ProMath, vol. 15, n.º 29-30, pp. 61–79, feb. 2001, Accedido: sep. 18, 2026. Disponible en: https://revistas.pucp.edu.pe/index.php/promathematica/article/view/8167