Pacheco-Bonrostro, J. A., & Casado-Yusta, S. (2017). Exact methods for variable selection in linear regression with subsets: Analysis of different tools and strategies. Revista Electrónica De Comunicaciones Y Trabajos De ASEPUMA, 18(1), 71–92. https://doi.org/10.24310/recta.18.1.2017.19916