New Symmetries, Conserved Quantities and Gauge Nature of a Free Dirac Field. - Vladimir V. Kassandrov; Nina V. Markova (Symmetry, 2021)

Algebrodynamics: Shear-Free Null Congruences and New Types of Electromagnetic Fields. - Vladimir V. Kassandrov; Joseph A. Rizcallah; Ivan A. Matveev (Axioms, 2023)