JOSÉ, S. R. C. .; OTONIEL, M. S. P. .; EDGARDO, C. S. L. . Marketing 4.0 to Improve the Positioning of the Optical Products of a Private Company, Trujillo, Peru. International Journal of Membrane Science and Technology, v. 10, n. 3, p. 3631-3647, 23 Jan. 2024.