Anthony NarkawiczJürgen GarloffAndrew P. Smith 0001César A. MuñozBounding the Range of a Rational Function over a box.34-39201217Reliab. Comput.http://interval.louisiana.edu/reliable-computing-journal/volume-17/reliable-computing-17-pp-34-39.pdfdb/journals/rc/rc17.html#NarkawiczGSM12