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If you refer to ATNF psrcat you can use this link.
Other links you may want to use: Precise γ-Ray Timing and Radio Observations of 17 Fermi γ-Ray Pulsars Ray, P. S. et al. 2011ApJS..194...17R
Timing gamma-ray pulsars with the Fermi Large Area Telescope: Timing Noise and Astrometry Kerr, M. et al. 2015ApJ...814..128K
Extending the event-weighted pulsation search to very faint gamma-ray sources Bruel, P. 2019A&A...622A.108B
Et cetera.
Pulsar History and Characteristics codes:
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