1. Heller, Michael; Pysiak, Leszek; Sasin, Wiesław
Quantum effects in a noncommutative Friedman world model
Canadian Journal of Physics, vol. 90, pp. 223-228 (2012).

2. Michael Heller, Leszek Pysiak and Wiesław Sasin
Fundamental Problems in the Unification of Physics
Foundations of Physics, vol. 41, pp. 905-918 (2011).

3. Michael Heller, Leszek Pysiak, and Wiesław Sasin
Geometry of non-Hausdorff spaces and its significance for physics
J. Math. Phys., vol. 52, p. 043506 (2011).

4. Michael Heller, Zdzisław Odrzygóźdź, Leszek Pysiak and Wiesław Sasin
Gravitational Aharonov-Bohm Effect
International Journal of Theoretical Physics, vol. 47, pp. 2566-2575 (2008).

5. M. Heller, Z. Odrzygóźdź, L. Pysiak, W. Sasin
Anatomy of Malicious Singularities
Journal of Mathematical Physics, vol. 48, pp. 092504-092511 (2007).

6. Michael Heller, Leszek Pysiak and Wiesław Sasin
Conceptual Unification of Gravity and Quanta
International Journal of Theoretical Physics, vol. 46, pp. 2494-2512 (2007).

7. Michael Heller, Zdzisław Odrzygóźdź, Leszek Pysiak, and Wiesław Sasin
Anatomy of malicious singularities
J. Math. Phys., vol. 48, p. 092504 (2007).

8. M. Heller, L. Pysiak, W. Sasin
Inner Geometry of Random Operators
Demonstratio Mathematica, vol. 39, pp. 971-978 (2006).

9. L. Pysiak, M. Heller, Z. Odrzygóźdź, W. Sasin
Observables in a Noncommutative Approach to the Unification of Quanta and Gravity: A Finite Model
General Relativity and Gravitation, vol. 37, pp. 541-555 (2005).

10. Michael Heller, Leszek Pysiak and Wiesłw Sasin
Noncommutative Dynamics of Random Operators
International Journal of Theoretical Physics, vol. 44, pp. 619-628 (2005).

11. Michael Heller, Leszek Pysiak, and Wiesław Sasin
Noncommutative unification of general relativity and quantum mechanics
J. Math. Phys., vol. 46, p. 122501 (2005).

12. M. Heller, Z. Odrzygóźdź, L. Pysiak, W. Sasin
Quantum Groupoids of the Final Type and Quantization on Orbit Spaces
Demonstratio Mathematica , vol. 37, pp. 671-678 (2004).

13. M. Heller, W. Sasin
Differential Groupoids and Their Application to the Theory of Spacetime Singularities
International Journal of Theoretical Physics, vol. 41, pp. 919-937 (2002).

14. M. Heller, W. Sasin, Z. Odrzygóźdź
State Vector Reduction as a Shadow of Noncommutative Dynamics
Journal of Mathematical Physics, vol. 41, pp. 5168-5179 (2000).

15. M. Heller, W. Sasin
Noncommutative Unification of General Relativity and Quantum Mechanics
International Journal of Theoretical Physics, vol. 38, pp. 1619-1642 (1999).

16. M. Heller, W. Sasin
Origin of Classical Singularities
General Relativity and Gravitation, vol. 31, pp. 555-570 (1999).

17. Michael Heller, Wiesław Sasin, and Dominique Lambert
Groupoid approach to noncommutative quantization of gravity
J. Math. Phys., vol. 38, p. 5840 (1997).

18. Marek Szydłowski, Michael Heller, and Wiesław Sasin
Geometry of spaces with the Jacobi metric
J. Math. Phys., vol. 37, p. 346 (1996).

19. Michael Heller and Wiesław Sasin
Noncommutative structure of singularities in general relativity
J. Math. Phys., vol. 37, p. 5665 (1996).

20. Michael Heller and Wieslaw Sasin
Structured spaces and their application to relativistic physics
J. Math. Phys., vol. 36, p. 3644 (1995).