Dynamical dark energy or variable cosmological parameters?

@misc{sola2005dynamicaldarkenergy,
      title={Dynamical dark energy or variable cosmological parameters?},
      author={Joan Sola and Hrvoje Stefancic},
      year={2005},
      eprint={astro-ph/0507110},
      archivePrefix={arXiv},
      primaryClass={astro-ph},
      url={https://arxiv.org/abs/astro-ph/0507110},
}