Cheap and Tight Bounds on the Solution Set of Perturbed Systems of Nonlinear Equations. - Lubomir V. Kolev; Ivo P. Nenov (Reliab. Comput., 2001)

Interval Methods for Accelerated Global Search in the Microsoft Excel Solver. - Ivo P. Nenov; Daniel H. Fylstra (Reliab. Comput., 2003)