An interval method for finding all operating points of non-linear resistive circuits. - Lubomir V. Kolev; Valeri M. Mladenov (Int. J. Circuit Theory Appl., 1990)

Approximate solutions to a dynamic worst-case tolerance analysis problem. - Lubomir V. Kolev (Int. J. Circuit Theory Appl., 1992)

An interval first-order method for robustness analysis. - Lubomir V. Kolev (ISCAS, 1993)

Interval Methods for Circuit Analysis - Lubomir V. Kolev (World Scientific, 1993)

An interval method for global non-linear dc circuit analysis. - Lubomir V. Kolev; Valeri M. Mladenov (Int. J. Circuit Theory Appl., 1994)

Interval methods for solving cellular neural networks (CNNs) equations. - Valeri M. Mladenov; Lubomir V. Kolev (ICECS, 1996)

Use of interval slopes in implementing an interval method for global non-linear DC circuit analysis. - Lubomir V. Kolev; Valeri M. Mladenov (Int. J. Circuit Theory Appl., 1997)

Use of Interval Slopes for the Irrational Part of Factorable Functions. - Lubomir V. Kolev (Reliab. Comput., 1997)

A linear programming implementation of a interval method for global non-linear DC analysis. - Lubomir V. Kolev; Valeri M. Mladenov (ICECS, 1998)

An efficient interval method for global analysis of non-linear resistive circuits. - Lubomir V. Kolev (Int. J. Circuit Theory Appl., 1998)

A New Method for Global Solution of Systems of Non-Linear Equations. - Lubomir V. Kolev (Reliab. Comput., 1998)

An Improved Method for Global Solution of Non-Linear Systems. - Lubomir V. Kolev (Reliab. Comput., 1999)

An interval method for global inequality-constraint optimization problems. - Lubomir V. Kolev; Dimitar Penev (ISCAS, 2000)

Automatic Computation of a Linear Interval Enclosure. - Lubomir V. Kolev (Reliab. Comput., 2001)

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

Outer Solution of Linear Systems Whose Elements Are Affine Functions of Interval Parameters. - Lubomir V. Kolev (Reliab. Comput., 2002)

Solving Linear Systems Whose Elements Are Nonlinear Functions of Intervals. - Lubomir V. Kolev (Numer. Algorithms, 2004)

An Improved Interval Linearization for Solving Nonlinear Problems. - Lubomir V. Kolev (Numer. Algorithms, 2004)

A Method for Outer Interval Solution of Linear Parametric Systems. - Lubomir V. Kolev (Reliab. Comput., 2004)

Assessing the stability of linear time-invariant continuous interval dynamic systems. - Lubomir V. Kolev; Simona Petrakieva (IEEE Trans. Autom. Control., 2005)

Outer Interval Solution of the Eigenvalue Problem under General Form Parametric Dependencies. - Lubomir V. Kolev (Reliab. Comput., 2006)

Improvement of a Direct Method for Outer Solution of Linear Parametric Systems. - Lubomir V. Kolev (Reliab. Comput., 2006)

New Formulae for Multiplication of Intervals. - Lubomir V. Kolev (Reliab. Comput., 2006)

Optimal Multiplication of G-intervals. - Lubomir V. Kolev (Reliab. Comput., 2007)

Determining the Positive Definiteness Margin of Interval Matrices. - Lubomir V. Kolev (Reliab. Comput., 2007)

Eigenvalue range determination for interval and parametric matrices. - Lubomir V. Kolev (Int. J. Circuit Theory Appl., 2010)

A Method for Determining the Regularity Radius of Interval Matrices. - Lubomir V. Kolev (Reliab. Comput., 2011)

Determining the Range of the Power Consumption in Linear DC Interval Parameter Circuits. - Lubomir V. Kolev (IEEE Trans. Circuits Syst. I Regul. Pap., 2011)

Determining the stability margin in linear interval parameter electric circuits via a DAE model. - Lubomir V. Kolev (Int. J. Circuit Theory Appl., 2012)

Regularity radius and real eigenvalue range. - Lubomir V. Kolev (Appl. Math. Comput., 2014)

Parameterized solution of linear interval parametric systems. - Lubomir V. Kolev (Appl. Math. Comput., 2014)

Componentwise Determination of the Interval Hull Solution for Linear Interval Parameter Systems. - Lubomir V. Kolev (Reliab. Comput., 2014)

Exact solution to a parametric linear programming problem. - Lubomir V. Kolev; Iwona Skalna (Numer. Algorithms, 2018)

Linear interval parametric approach to testing pseudoconvexity. - Milan Hladík; Lubomir V. Kolev; Iwona Skalna (J. Glob. Optim., 2021)