Bereanu, Cristian, and Alexandru Pirvuceanu. “S^1 - Index Theory for the Lorentz Force Equation”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE (January 19, 2026): 25. Accessed March 7, 2026. https://journals.sns.it/index.php/annaliscienze/article/view/7252.