Aleksander V. Chichurin is a Professor at The John Paul II Catholic University of Lublin, Poland. His research interests currently span differential equations, mathematical modelling, computer algebra systems. Elena M. Ovsiyuk is currently head of Theoretical Physics and Applied Informatics at Mozyr State Pedagogical University in Belarus. Her current research areas include elementary particles with spin in external electromagnetic and gravitational fields. Viktor M. Red’kov is Chief Researcher for the Institute of Physics at the National Academy of Sciences of Belarus. His primary fields of research include elementary particles with spin in external electromagnetic and gravitational fields.