Primordial universe with the running cosmological constantJhonny A. Agudelo Ruiz, Tibério de Paula Netto, Júlio C. Fabris and Ilya L. ShapiroEur. Phys. J. C, 80 9 (2020) 851DOI: https://doi.org/10.1140/epjc/s10052-020-8226-x