A discrete-time interpretation of the Planck-Einstein equation. Boyarsky, A. (2006) Discrete Dynamics in Nature and Society
A New Model of Nonlocal Modified Gravity Ivan Dimitrijević, Branko Dragovich, Jelena Grujić, Zoran Rakć (2013) Publications de l'Institut Mathématique
Accelerated Lyra's cosmology driven by electromagnetic field in inhomogeneous universe. Pradhan, Anirudh, Yadav, Padmini (2009) International Journal of Mathematics and Mathematical Sciences