1. Nicolas Franco, Michał Eckstein
Causality in noncommutative two-sheeted space-times
, vol. xxx, pp. xxx-xxx (2015).

2. Nicolas Franco
Temporal Lorentzian Spectral Triples
Rev. Math. Phys., vol. 26, 8, p. 14300076 (2014).

3. Nicolas Franco, Michał Eckstein
Exploring the Causal Structures of Almost Commutative Geometries
SIGMA, vol. 10, 010 (2014).

4. Nicolas Franco, Michał Eckstein
An algebraic formulation of causality for noncommutative geometry
Class. Quantum Grav., vol. 30, p. 135007 (2013).

5. Nicolas Franco
Global Eikonal Condition for Lorentzian Distance Function in Noncommutative Geometry
SIGMA, vol. 6, 064 (2010).