See Parker, R.A.; Dubberstein, Waldo H. (1956). Babylonian Chronology, 626 B.C.–A.D. 75. Providence: Brown University Press. p. 28. OCLC460027103., who put down only two regnal years for this king.
See Parker, R.A.; Dubberstein, Waldo H. (1956). Babylonian Chronology, 626 B.C.–A.D. 75. Providence: Brown University Press. p. 29. OCLC460027103., who put down only four regnal years for this king, and who is called by them Nergal-Shar-Usur.