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.A.TheVariabilityoftheRotationoftheEarth.JournaloftheRoyalAstronomicalSocietyofada.1928,22:145–147.Bibcode:1928JRASC..22..145P.

    Seidelmann,P.Keh编.ExpnatorySupplementtotheAstronomicalAlmanac.MillValley,California:UySceBooks.1992:79–80.ISBN0-935702-68-7.原始内容存档於2017-11-14.

    LeapSeds.TimeServiceDepartment,UatesNavalObservatory.[2008-12-27].原始内容存档於2012-02-07.

    WmMarkowitz1988''''parisoSor,ETLunar,UTandTDT'''',ineds.AKBabcock&GAWilkins,''''TheEarth''''sRotationandReferenceFramesfeodesyandGeophysics'''',IAUSymposia#1281988,atpp413–418.

    DDMcCarthyandAKBabcock1986,"TheLengthoftheDaySince1658",Phys.EarthPer.,No.44,pp.281–292

    RANelson,DDMcCarthy,SMalys,JLevine,BGuinot,HFFliegel,RLBeard,andTRBartholomew,2001"TheLeapSed:itsHistoryandPossibleFuture"2001,Metrologia38,pp.509–529

    Stephenson,F.R.;Morrison,L.V.Long-termfluctuationsih''''srotation:700BCtoAD1990.PhilosophicalTransasoftheRoyalSocietyofLondonA.1995,3511695:165–202.Bibcode:1995RSPTA.351..165S.doi:10.1098/rsta.1995.0028.

    McCarthy,DD;Ha,elson,RA.ThePhysicalBasisoftheLeapSed.AstronomicalJournal.2008,1365:1906–1908.Bibcode:2008AJ....136.1906M.doi:10.1088/0004-6256/136/5/1906?.

    Jespersen,James;Fitz-Randolph,Jane.FromSundialsToAtomicClocks:UandingTimeandFrequencyPDF.NationalInstituteofStandardsandTeology.1999:109.

    Bir,ByronE.编,NBSMonograph140:TimeandFrequency:TheoryandFualsPDF:8,May1974

    McCarthy,DennisD.;Seidelmann,P.Keime:FromEarthRotationtoAtomi