Oligopoly's Shift to Open Access. How For-Profit Publishers Benefit from Article Processing ChargesButler, L.-A., Matthias, L., Simard, M.-A., Mongeon, P., & Haustein, S. (2022). The Oligopoly's Shift to Open Access. How For-Profit Publishers Benefit from Article Processing Charges (Versión v1). Zenodo. https://doi.org/10.5281/zenodo.7057144