completion of the Friedmann equationsStephen Angus, Kyoungho Cho, Guilherme Franzmann, Shinji Mukohyama and Jeong-Hyuck ParkEur. Phys. J. C, 80 9 (2020) 830DOI: https://doi.org/10.1140/epjc/s10052-020-8379-7