Staff (2015). "UCLA Cosmological Calculator". UCLA. Retrieved 6 August 2022. Light travel distance was calculated from redshift value using the UCLA Cosmological Calculator, with parameters values as of 2015: H0=67.74 and OmegaM=0.3089 (see Table/Planck2015 at "Lambda-CDM model#Parameters" )
Staff (2018). "UCLA Cosmological Calculator". UCLA. Retrieved 6 August 2022. Light travel distance was calculated from redshift value using the UCLA Cosmological Calculator, with parameters values as of 2018: H0=67.4 and OmegaM=0.315 (see Table/Planck2018 at "Lambda-CDM model#Parameters" )