Dennis, DavidDavidDennisKreinovich, VladikVladikKreinovichRump, Siegfried M.Siegfried M.Rump2021-05-052021-05-051998-05Reliable Computing 23 (5): 191-197 (1998)http://hdl.handle.net/11420/9436Interval (two-sided) estimates developed by John Wallis in the 17 century can be considered as an important step towards development of Newton-Leibniz's calculus.en1573-134019985191197University of Louisiana at LafayetteMathematikJournal Article10.1023/a:1009989211143Other