Benci, V. and Fortunato, D. (2005) “Matter and electromagnetic fields: remarks on the dualistic and unitarian standpoints”, Topological Methods in Nonlinear Analysis, 25(1), pp. 23–40. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2005.002 (Accessed: 22 July 2024).