Duality between k-essence and Rastall gravityKirill A. Bronnikov, Júlio C. Fabris, Oliver F. Piattella, Denis C. Rodrigues and Edison C. SantosEur. Phys. J. C, 77 6 (2017) 409DOI: https://doi.org/10.1140/epjc/s10052-017-4977-4