1. Michał Eckstein, Nicolas Franco
Causal structure for noncommutative geometry
Frontiers of Fundamental Physics, vol. 14, pp. 138-xxx (2015).

2. Edited by James Ladyman, Stuart Presnell, Gordon McCabe, Michał Eckstein, Sebastian J. Szybka
Road to Reality with Roger Penrose
CCPress

3. Editors: Michał Eckstein, Michael Heller, Sebastian J. Szybka
Mathematical Structures of the Universe
Copernicus Center Press (2014)

4. Nicolas Franco, Michał Eckstein
Noncommutative geometry, Lorentzian structures and causality
in “Mathematical Structures of the Universe”, eds. M. Eckstein, M. Heller, S.J. Szybka, Copernicus Center Press (2014), pp. 315-340