Bureau International des Poids et Mesures: Le Système international d’unités, The International System of Units. 9e édition, Sèvres 2019, ISBN 978-92-822-2272-0, S. 21, 133; bipm.org (PDF; 2 MB)
M. Stock, R. Davis, E. de Mirandés, M.J.T. Milton: The revision of the SI – the result of three decades of progress in metrology. In: Metrologia, Band 56, Nummer 2 (2019), S. 8 und 9, doi:10.1088/1681-7575/ab0013
International Association for the Properties of Water and Steam (IAPWS): Guideline on the Use of Fundamental Physical Constants and Basic Constants of Water. IAPWS G5-01(2016) (PDF, 40 KB): „For the triple-point pressure, we recommend the value measured by Guildner et al. [...], which is (611.657 ± 0.010) Pa.“
L.A. Guildner, D.P. Johnson, F.E. Jones: Vapor Pressure of Water at Its Triple Point. In: Journal of Research of the National Bureau of Standards - A. Physics and Chemistry, Vol. 80A, No. 3, May-June 1976, S. 505–521; nist.gov (PDF; 18,1 MB)