1. Idempotents, group membership and their applications;Mathematica Slovaca;2018-11-20
2. Square Roots of Real 3 × 3 Matrices vs. Quartic Polynomials with Real Zeros;Analele Universitatii "Ovidius" Constanta - Seria Matematica;2017-12-20
3. Philosophy of the Matrix;Philosophia Mathematica;2016-12-26
4. Cayley, Sylvester, and Early Matrix Theory;Linear Algebra and its Applications;2008-01
5. Hypercomplex quantum mechanics;Foundations of Physics;1996-06