Paz, J. L., and E. Squitieri. “Theoretical Investigation of the Non-Degenerate Four-Wave Mixing Response for Cyanine Systems Within the VB-CT Model: Relation time”™s Effects”. Ciencia, Vol. 13, no. 4, 1, https://produccioncientifica.luz.edu.ve/index.php/ciencia/article/view/9289.