1. NANOGrav collaboration, The NANOGrav 15 yr Data Set: Search for Signals from New Physics, Astrophys. J. Lett. 951 (2023) L11 [arXiv:2306.16219] [INSPIRE].
2. NANOGrav collaboration, The NANOGrav 15 yr Data Set: Observations and Timing of 68 Millisecond Pulsars, Astrophys. J. Lett. 951 (2023) L9 [arXiv:2306.16217] [INSPIRE].
3. NANOGrav collaboration, The NANOGrav 15 yr Data Set: Evidence for a Gravitational-wave Background, Astrophys. J. Lett. 951 (2023) L8 [arXiv:2306.16213] [INSPIRE].
4. EPTA collaboration, The second data release from the European Pulsar Timing Array. I. The dataset and timing analysis, Astron. Astrophys. 678 (2023) A48 [arXiv:2306.16224] [INSPIRE].
5. EPTA, InPTA: collaboration, The second data release from the European Pulsar Timing Array. III. Search for gravitational wave signals, Astron. Astrophys. 678 (2023) A50 [arXiv:2306.16214] [INSPIRE].