The concept and direction of time
- The nature and origin of time-asymmetric spacetimes - arxiv:1012.4708 - download (650kB pdf)
- Open questions regarding the arrow of time In: L. Mersini-Houghton, R. Vaas (eds.): The Arrows of Time (Springer 2012) – arxiv:0908.3780 – download (190kB pdf)
- Comment on the „Janus point“ explanation of the arrow of time - arXiv:1601.02790 - download
- Time in Quantum Theory In: Compendium of Quantum Physics, D. Greenberger, K. Hentschel, and F. Weinert, edts. (Springer 2009) – download
- Remarks on the compatibility of opposite arrows of time II, Entropy 8[2], 44-49 (2006)
- Where has all the information gone? Phys. Lett. A347, 1 (2005) – gr-qc/0507051
- Remarks on the compatibility of opposite arrows of time, Entropy 7[4], 199-207 (2005) – physics/0306083
- Note on the time reversal asymmetry of equations of motion, Found. Phys. 12, 193 (1999) - physics/9903046
- Über die "Zeit in der Natur" In: Selbstorganisation - Jahrbuch für Komplexität (Duncker & Humblodt 1998) - download here
- Arrow of time in a recollapsing quantum universe (with C. Kiefer), Phys. Rev. D51, 4145 (1995) – gr-qc/9402036
- Time (a-)symmetry in a recollapsing universe, in Physical Origins of Time Asymmetry, J.J. Halliwell, J. Peres-Mercador, and W.H. Zurek, edts., (CUP 1992) - download
- Quantum cosmology as an initial value problem (with H.-D. Conradi), Phys. Letters A154, 321 (1991)
- Time in quantum gravity, Phys. Letters A126, 311 (1988)
- Emergence of classical time from a universal wave function, Phys. Letters A116, 9 (1986) – download here
- Quantum theory and time asymmetry, Found. Phys. 9, 803 (1979) - quant-ph/0307013
. - Time travel: is it science or mere fiction? (book review), Physics World (December 2001) - text
- Book: The Physical Basis of the Direction of Time, 5th edn. (Springer 2007) - some sample texts can be found here
- Entropie (book in German: Fischer-Kompakt 2005) – s. Inhaltsverzeichnis