Tilca, Magnolia. 2014. “Existence Theorem for the Prices Fixed Point Problem of the Overlapping Generations Model, Via Metric Spaces Endowed With a Graph”. Studia Universitatis Vasile Goldiș Arad, Seria Științe Economice 24 (2), 57-65. https://publicatii.uvvg.ro/index.php/studiaeconomia/article/view/278.